Brian Cox visits the world's biggest vacuum | Human Universe - BBC

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Watch the BBC first on iPlayer 👉 bbc.in/iPlayer... Brian Cox visits NASA’s Space Power Facility in Ohio to see what happens when a bowling ball and a feather are dropped together under the conditions of outer space.
In this episode, Professor Brian Cox explores our origins, place and destiny in the universe. We all start our lives thinking that we are at the centre of the universe, surrounded by our family and the world as it spins around us. But the urge to explore is strong. Brian tells the story of how our innate human curiosity has led us from feeling that we are at the centre of everything, to our modern understanding of our true place in space and time - that we are living 13.8 billion years from the beginning of the universe, on a mere speck of rock in a possibly infinite expanse of space.
Human Universe | Series 1 Episode 4 | BBC Four
#bbc #HumanUniverse
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[@DexM47]

I love the fact that they know exactly what's gonna happen but still find it marvelous when it happens.

[@g4macdad]

Shows that atheists are not nearly as sure as they pretend to be. In fact, sure of nothing.

[@nonotherthananother]

They spend money and 3h of their time just to film this. Idiots, they don't need chamber this big, and best of all it is a cornerstone law of physics, so better believe it and go to the pub.

[@ReasonMakes]

It is the most satisfying thing in science to predict something and then see it follow your prediction

[@nonotherthananother]

@@metroid1 Of course.

[@ysteinlndalnilsen9924]

@@g4macdad Wait so only atheists believe in gravity?? I really don't understand what atheism has to do with this video. But if ur wondering why scientist make a smile when theories gets proven correct, its simply the fact that in science u have to prove to be right. Even tho we know pretty much 99% that a theory is correct we still have to test and prove till we truly know the facts. On the other side we have people like u, who i assume is religious. Would u say believing a book written by who ever 1000+ years ago is being critical? Sure u can believe it, that's up to u and i have no problem with that. But in science we actually try our best to look for the facts and explore this wonderful world and universe. If everyone was just gonna read one book and not keep looking for new answers we would not be here on a computer watching this video right now. U should never underestimate the importance of science. And also, there are multiple scientists with religious beliefs.

[@rick1646]

Imagine Galileo seeing it he would have cried watching this amount of beauty.

[@theseductivepotato7459]

Wasn't Newton the one who predicted that a feather and a brick would fall down at at the same speed if air resistance wasn't present?

[@theseductivepotato7459]

Oh my bad, just checked and turns out it was Galileo, thanks

[@emanuelxavier9923]

@@theseductivepotato7459 newton just prove mathematically the concept

[@unbeatableox3846]

@@emanuelxavier9923Physicists always prove things mathematically.

[@mbayoumi1]

@@theseductivepotato7459 500 years before Newton and Galileo, it was said in Arabic book written by Abu'l-Barakāt al-Baghdādī. , u can recheck

[@adam_fakes]

I love the look on the Engineer's faces, they know it, but to see it.

[@fromnorway643]

Yes, knowing something and seeing it with your own eyes are two different things. One of the Apollo 14 astronauts, Edgar Mitchell, once said in an interview that the lunar mission changed him from having an _intellectual_ understanding of the immensity of the universe and the Earth's tiny place in it to having a deep _gut_ understanding.

[@ianproudlove1540]

That was full speed u loony

[@eventcone]

@Bugs Bunny It was already "shattered".

[@shazanali692]

The engeneers probally never did this experiment until cox told them, so thats why they are amazed, or they had not done it in a couole of years

[@Amen-Magi]

If know somthing its not mean you be tierd too see it again .like seeing you family or eat your Favorite food.or listening you do it all your life you dont bored

[@JavierBonillaC]

Not having this in real speed is the most frustrating thing that has happened to me in like 5 years!!! Imagine the chance of seeing a feather fall like a rock! Instead we get slow motion and the feather falling like we always see it falling.

[@profquad]

it's really driving me crazy

[@Chevyguy723]

ditto, not sure wtf they were thinking

[@IfUfindthisURlost]

Yep! Seems a wasted oportunity. Those science guys aren't as smart as they make out!

[@Seanw101]

Exactly

[@haasoc2716]

bro, it is for you to observe better:) still fascinating to see in slow motion.

[@TackerTacker]

Why did they show it in slowmo only? I'd have loved to also see it in real time :( Seeing a feather drop to the ground as fast as a bowling ball would've been the much more interesting shot IMO

[@dekab6133]

Yeah, it slightly piss me off the lack of real time shot.

[@Mohammed_Ahmed99]

I'm pretty sure that the bowling ball would fall at the same speed as the feather

[@-x-3694]

Watch in 2x speed 😎

[@dekab6133]

@@invisyarcticfreak Nope, it's the feather that fall faster without attrition

[@DJFiBa]

It's NASA on BBC...

[@Desmodromic916]

In Nasa research center, they countdown from 10 before flushing the toilet

[@kougou48]

HAHAHAHAHAHA

[@Omi142]

Lol

[@willclark8970]

and call out "preparing for drop"

[@RV-fg3ml]

And gravity pulls the shit out of their ass

[@elijahcox6920]

Yes.

[@baekhyunee4u]

Everyone's saying their teacher forced them to watch this but I came here myself....

[@TheTimesOfOld]

Same

[@hala4324]

LOL me too

[@parzival7309]

Same lol,there is no more beautifil thing than be passionated and curious about science,in every form it takes

[@LARRYSEIPRODUCTSLLC]

Q: What if there was an exterior magnet that balanced the middle in-between magnets g-force rotation around center magnet? 😁 Also my opinion on gravity is that exterior of planet earth is the condensed pressure on to earth pushing objects down that are not closest to its properties (likes attract) oil and water separate and decide position from the greater amount of mass that surrounds the smaller volume of mass. Is this possible? Please explain. Thanks

[@Jay-lw8mi]

same

[@VivekBarolia]

How many are here because of ashu sir

[@TalatParveen-tn7fm]

😅👍🏻

[@AmandeepSingh-o4v]

Me Amandeep here by ashu sir

[@Akshittyagi21]

Me

[@chintumali-te2tx]

me😅

[@NotAndhbhakt.1]

Me today

[@rajdeepchakraborty9533]

This is one of the most beautiful video I have ever seen. Years and years of humans pushing their knowledge just to understand the working of the universe in a much better way.

[@KissMyFatAxe]

And yet some people still claim it's all a lie and "fake news". Those people shouldn't breed.

[@attav8]

@@KissMyFatAxe it is fake lol

[@Based-Anti-Theist]

@@attav8 Dont breed

[@mikecheck1two453]

The feather’s move right as they are released, this is suspect. Why the slow motion and cut shots too? Man, show it in real time, uncut as well. Too many talented special effects folks out there to not have the uncut real time footage shown as well.

[@heldermonteiro2718]

@@KissMyFatAxe This test didn't answer the question if things are upside down how that things are attracted towards the planet

[@MarcoAGJ]

The fact the second drop was shown in slow motion actually bugged me more than it should.

[@whatevernoticed]

its 2016, you can make the video run at normal speed yourself.

[@mikes899999]

It's 2017 ;)

[@enquire422]

Mikes8899 Earth is flat , BBC lies!

[@jacobe1942]

you never know, maybe it was sped up!

[@jacobe1942]

I am a free thinker like einstein. he would propose that if you can change the speed of the video feed then it is impossible to deduce what initial speed the ball was falling. perhaps without an atmosphere the pressure would cause gravity to have less of an impact, we do see the ball struck the card board at significant force though that is is probobaly not the case, but without a reference its impossible to say for sure. some other interesting observations. 2:53 shows 1 ball 1 feather starting to drop, then next clip is ball and like 7 feathers? ok odd..... then at 4:16 the feather shows much more wind resistance and the ball dropping faster than the feather. and then back to the 7 feathers and 1 ball clip. so badly edited

[@adamhowitt4033]

I’m sorry but what every person wants to see is a sheet of A4 paper go down perfectly straight and not do flips

[@Sithlug]

the feathers didn't move but hit the ground with so much more force and speed than with resistance, feather/paper very similar

[@druidofthefang]

and do not slow it down and show the same slowed down footage 17 times...

[@momo-zg3kn]

Nice pic

[@adamhowitt4033]

momo cheers, assuming you are talking to me

[@oldi184]

True, a sheet of paper would be more impressive.

[@amydxnne]

özcan aykın'dan geldik :))

[@marcelomarquez2089]

TCHUPVIEJEN

[@anarchyxskamfull]

aynen öylee

[@patroclus1729]

It's the most beautiful thing to watch, ball and the feather falling together.

[@hunchily]

It would be if they didn't slow it down

[@hunchily]

@Filthy Animal it's still slower than real-time speed

[@pandorahecate1584]

Absolutely fascinating. Makes me wanna become a scientist. You can see how enthusiastic they are about it all makes me smile and its one of the most beautiful videos I have ever seen

[@SuzukiKid400]

Being a scientist or an engineer is a very rewarding career. A lot of frustration and issues to solve but when you get something to work as you intended, the joy is immeasurably satisfying!!!

[@AlexandraGuttman-sd6ni]

You should give it a try! The world could always use another scientist!

[@ericocb]

Find wht u love and apply science to it

[@mazeu9105]

I wanted to se how weird it would look if the feathers was falling fast, as fast as the bowling ball. But of course this was in slow motion.

[@chrrissss]

Mazeu here’s a similar experiment doing showing full speed kzbin.info/www/bejne/qWq9k2audsx8pbs

[@asicdathens]

it has been done on the lunar surface.....

[@Astrix_Jaeger]

set video speed to 1.25

[@Astrix_Jaeger]

oh wait 1.5 rather

[@Astrix_Jaeger]

forget it, i tried 2.0 still shit like my suggestion

[@dsdy1205]

I think what I love most of all is how all the seasoned NASA engineers are still nerding out about it. They put men on the Moon, the concepts involved in this experiment are child's play for them. But seeing a bowling ball and a feather fall at the same time, seeing that visceral smack of the feathers and watching the equations you use everyday come to life is still special.

[@NVmountaineer]

​@davidmudry5622 IF, you were inside this vacuum chamber, you couldn't throw the bowling ball... you would be dead.

[@paoloorione]

the thing that hurts me most in this age of conspiracy is the lack of curiosity and imagination. The curiosity and imagination that sixty years ago allowed extraordinary men to accomplish extraordinary feats

[@TheNagualWilliam]

If you believe a man went to the moon you are wasting your time studying anything and should be reading comics.......

[@godbyone]

@@TheNagualWilliamfact. You will never see a nasa astronaut in a space suit in there with vacuum on. Fact. Will never happen. Has not been done . It would be pulled apart. In 3 minutes

[@us3rG]

If you believe man lost his way back to the moon, you are far gone in to the artificial reality ​@@paoloorione

[@WildPhotoShooter]

Thinking of how Newton and Galileo would react to this, seeing their lifes work in action, puts a lump in my throat , they were two astounding human beings.

[@atulyaaishwarya3550]

Well, they observed it right but explained it wrong. It was actually Einstein

[@muddyfunker3014]

I love this comment

[@lucaslinares7806]

Some day we will be able to go back in time and tell them 😉

[@WildPhotoShooter]

@@lucaslinares7806 Im sceptical about time travel, 🤷🏻‍♂️

[@emotionalvideos6897]

@@WildPhotoShooter it was not Galileo, he just copied it...

[@TonyBullard]

I can't believe they never showed it fall at full speed! We've all seen bowling balls and other heavy object moves in slow motion...that's not unusual at all. But to see a feather fall quickly from that height without it being disturbed by air around it, that's novel! And yet the editors chose to leave out that footage entirely. I feel robbed!

[@gonedeadforlife]

they did show it towards the end pay attention

[@TonyBullard]

gonedeadforlife You got a timestamp? Cause I never saw it fall in real time.

[@gonedeadforlife]

Tony Bullard 4:13 they show it a little enough to see what it looks like

[@TonyBullard]

4 minutes and 41 seconds, and only about 3 quarters of a second, in a super wide angle, is at actual speed. Very lame.

[@WillRose3]

Completely agree. Right from the first second of the video, that was the footage I was waiting for. Pretty disappointing.

[@michaelmannucci]

I'm actually so frustrated that they didn't show this in normal speed. I want to see feathers fall at regular speed. Wtf is wrong with the producers?

[@TheSuperCommentGuy]

For once in our life we get to see feathers fall really fast. And then they slow it down!

[@evanwilliams8289]

didnt wait till the end of the video huh?

[@Simbaw5100]

Michael Mannucci same!

[@alexleibovici4834]

+誰誰在 Yes, it realy sounds stupid. Why do you think it was faked? What results have you expected?

[@pinkfurryhat]

i did but it only showed one second of it

[@burningnose5866]

I am 62 and no teacher said I should look those videos. They are interresting for me...

[@Razta_S]

These guys who have been managing this multi million dollar structure are still fascinated by how this known principle of gravity works. That’s what I love about scientists. They are genuinely amazed by their field every time.

[@sharpuslf]

That is exactly what makes me suspicious. Their amazement would have faded away long ago, yet they pretend to be amazed for the camera. I get the host, presumably this is his first time...but the others? Seems odd.

[@Razta_S]

If you want to doubt it, y don’t you try to find out for yourself? Instead of taking the easy way out and leaving a comment on a KZbin vid.

[@sharpuslf]

@@Razta_S Who says I am not trying to find out how this works?

[@albertraich3492]

I guess they a very tight schedule, and this is just a break for them of their daily routine.

[@Razta_S]

I’m not tying to argue with you. I just expressed my amazement. I appreciate your comments.

[@leokimvideo]

this video sucks in a very good way

[@jorge21cod]

It's becuse the machine is a vacuum

[@BigOlSmellyFlashlight]

leokimvideo holy shoot

[@hotmojoe2483]

god dammit

[@solstice5599]

NUKE did you not get the joke.

[@jackgoff5174]

NUKE you’re not very smart are you?

[@FleaOnPeanut]

All that work and you never bother to run it at normal speed. Which would sell the whole element of heavy and light moving at the same speed. In slow motion it just seems dreamy and unreal. I don't get why people have a hard time getting this. Show both slow and normal speed if you have slow motion.

[@therebel4332]

+FleaOnPeanut They wont show it in live speed because they can't. its a crock of shit and they know it which is why they are laughing their tits off. people have well and truly duped if they believe this crap.

[@FleaOnPeanut]

Ah, right. This is why I shouldn't post comments on youtube. Thank you for reminding me. For the record I do like this video, and my gripe was with a technical style choice. I won't respond after this comment. Take care.

[@DulksVenee]

+FleaOnPeanut The slow motion is there so you can clearly see that they are travelling and accelerating at the same ratio. And of course... for dramatic effect. I agree on that part that they should have showed it at normal speed at least once.

[@superbionicbatman]

+FleaOnPeanut Modern Science has to be fluffy and dreamy. Personally, I want real and I want facts.

[@peterjf7723]

+Andrew Jackson The bowling ball will fall faster in a vacuum than in air, both the feathers and the ball are slowed by air resistance.

[@DeepSukhwani]

Just started reading Deep Simplicity by John Gribbin and searched for "objects falling on airless moon" and came right through to this video. Remarkable! Just fell in love with Science once again.

[@jurassicparkmark4188]

Who else is watching this in 2020 because your teacher made you

[@AndreaVegaa]

okay but what conclusions did u get, cause they asked me that and I have no idea m8

[@keenynman34]

@@AndreaVegaa Theres gotta be a reason that the apple falls "Down" to the earth instead of going sideways or continuing up. He then developed a theory that there was a strange invisible force pulling things to the centre of the earth called "Gravity" And then he did a bunch of math and found out he was right.

[@だいすけ-z8d]

me from Japan

[@kamyip4226]

Y e s- H e l p-

[@Saami674]

yes from French

[@rahulb.329]

Couldn't even insert 2 seconds of normal speed clip? Wtf

[@shanedonlon1039]

Rahul Bondar look for the full documentary idiot. You’ll find that they do show it at normal speed. Don’t Rely KZbin showing you everything you want to see.

[@vargasbasti]

kzbin.info/www/bejne/qWq9k2audsx8pbs normal speed

[@marvinmartinsYT]

Why do you need that

[@rachytony7827]

@LUNA GUEVARA hahahaha

[@rwood1995]

@@marvinmartinsYT because......... 9.8 meters per second per second ..... god dammit. The vacuum is to demonstrate gravity interaction in its purest form.

[@HardayalSingh-tr8pm]

even though I already knew what would happen it still felt so beautiful

[@bryananofa7165]

Do you know its dangerous to be in a low room?

[@joeg5265]

The music

[@BL12378]

Özcan aykindan gelenler seviliyorsunuz hocam ❤

[@matteoo_bruno]

It's gorgeous how a brilliant man gave this theory so many years ago and without be able to verify it with such advanced tools

[@khuti007]

He was so brilliant that if you read his paper, he actually says, this is what happens but I have no idea why? He understood, that he didnt have it all. Einstein worked out why.

[@aaronclegg5696]

I teach 9th grade physics, and this video actually confuses my students. This film is the absolute best experimental demonstration of freefall's independence of mass, but it has one confusing point. The film shows the evacuated drop only in slow motion, never in real-time. As a result, most of my students believe that removing the air from the chamber makes both objects weightless and drastically slows down their acceleration. Even though I tell them repeatedly that the video is in slow motion, we know that students often don't listen to what we tell them, instead believing their eyes. Many of my students write things like this: "Reason why bowling ball and feather hit the ground in same time in vacuum chamber is because less air mean less force which seem like they standing stell and going very slowing down" [sic] This video would be much better for students if they first showed the real-time video of the vacuum condition before showing the slow motion video, just as they did in the first experiment (with air).

[@alexleibovici4834]

> This video would be much better for students if they first showed the real-time video Yes, maybe... However, the entire fall takes less then 3 seconds, so that it would be difficult to observe that the two bodies are perfectly synchronized all the time...

[@magoninhogamer]

just put a small piece of paper over a notebook, then drop them to the ground, the notebook will remove air resistence behind it and the piece of paper won't be affected

[@alexleibovici4834]

@@magoninhogamer > just put a small piece [...] And what will this prove?

[@supeskrim]

@@alexleibovici4834 The much lighter paper (feather) without buoyancy/drag coeficient of medium fall at the same rate as the much heavier notebook/book/object. If the paper & notebook is drop side by side the fall rate is significantly differ due to CD of medium. The same principle can be used to safe gas/energy by tailgating a larger vehicle or in race your opponent car/bycycle/etc, or bird formation for lengthy flight.

[@alexleibovici4834]

@@supeskrim > The much lighter paper (feather) without buoyancy/drag coeficient of medium fall at the same rate as the much heavier notebook/book/object. This is a completely different phenomenon that the one presented in this video. The one in this video is purported to show that the acceleration of a body does not depend on its mass IF the only force acting on it is gravity.

[@zeet7698]

It's amazing how a crazy scientist named Galileo gave this theory 400 years ago.

[@lucadipietro2310]

Actually the concept is obvious! But we can not see! Do you know how Galileo discovered this? Because he made fall a small iron ball of 10 grams and a paper also of 10 grams from the same high... and he saw that the ball still to arrives in the floor before than paper. So, this means that is not about the weight!!!!

[@thevigamerpixerlator]

@@lucadipietro2310 Of course its a theory, but that test didn't prove his thought that air resistance was the cause of objects falling at a different rate. The definitive test he made was to create 2 iron balls of different weights but of the same diameter. In this case, both the balls fell at the same speed and that's the proof that Galileo needed to show how the concept works.

[@jonahjerryson4913]

@@thevigamerpixerlator what is so bad if it is a theory a theory and a hypothesis are different

[@thevigamerpixerlator]

@@jonahjerryson4913 I agree, they are. A hypothesis is an assumption based off facts that you may infer to. A theory on the other hand, is a proven answer that is done through multiple testing procedures. That is literally what I was saying.

[@jonahjerryson4913]

@@thevigamerpixerlator oh sorry my bad

[@karlylove9791]

Brian Cox is the man. Imagine how many scientific careers his narration and presence have launched.

[@jerryross2]

? The interesting part of the experiment is seeing it performed in real time. Why on earth didn't your show the real time footage to show how quickly the feathers are dropping? - Physics professor

[@BobbieBees]

where's the fun in watching something go so fast that you'd miss it if you blinked.

[@neerkoli]

Bobbie Bees They can show the slow motion later, after showing the real time footage first.

[@IcedPlasma]

It's rigged pretty high up. The fun is seeing a feather fall as fast as a bowling ball.

[@jan-thijnwijnker6762]

Jerry Ross 9,8m/s^2 now happy

[@zammmerjammer]

+Karim You keep posting the same comment on every thread. So, listen up -- 1.37 seconds is PLENTY OF TIME. The human mind is capable of tracking motion that occurs over a second, ffs. You're basically arguing that if someone dropped something off the roof of a house, it's trajectory would be invisible to the human eye. The decision not to show the entire drop of both feathers and ball at real speed the whole way through is just baffling (and stupid).

[@좋아과학-e5e]

I am a science teacher in Korea. This video is amazing. I really appreciate everyone who filmed the video.

[@jenm1]

Hi, could you please explain if there is negative pressure in the surroundings when it's made into a vacuum? I'm confused on that.

[@hudson415]

닥쳐 한국어 여기 초밥이 없어

[@nadadada9784]

The Music makes the experiment even more beautiful

[@haziblathif491]

Know the title?

[@manve5652]

What’s the song’s name?

[@siddheshvalantino8288]

Yes thanks to bbc

[@adnantunc37]

Nice bro. Thanks 👍 even our Fatih laughed out loud. Adamım

[@pnarklc738]

yes i agree budy! 👍🏻

[@brucebaxter6923]

Amazing how slow the ball falls in a vacuum.

[@insidemechanics]

Haha

[@oreolamp5676]

Is this comment serious or not? The shot is slowed down

[@brucebaxter6923]

Eero L. No, it's not serious.

[@oreolamp5676]

+Bruce Baxter such sarcasm, much wow

[@brucebaxter6923]

QB Machine Yes, the ball is slowed by the vacuum so that it keeps pace with the feather

[@pranjalvw2193]

as an astrophysicist, it gives me immense satisfaction to watch our equations, postulates and study implements accurately as it is explained... Marvellous video... Hats off to BBC

[@Tom-qw8fg]

It's always nice when the equations WORK! As an amateur ballistician I understand your satisfaction!

[@womp6338]

"our" equations lol you mean Newtons, you didn't invent them.

[@rg5312]

They aren't your equations, you haven't come up with anything. BBC didn't do anything either, it was NASA that built the chamber, they were just allowed in to film. People like you are what is wrong with this world.

[@MadMonkey572]

>see video >looks interesting >click on it >see a comment I made >forgot I already watched it

[@arkie87]

forgot i already read this comment

[@Wheredatruth_at23]

Stop trying to greentext, it's not 4chan and it's so freakin cringey.

[@MadMonkey572]

>implying

[@202015spongebob]

+Cyrus Hinojos fr

[@anonymous7371]

Guy: This is NASA's.... I skipped the video

[@CandyCrush_Joe]

This video is given to be watched in our textbook Luv from India 🇮🇳 ❤

[@cogitateandabet]

That put a simile on my face. The scientists didn't have this facility back then, yet they predicted it so correctly.

[@dvillisback]

❤❤🎉🎉🫦🤱👙❤️‍🔥💓💕

[@dvillisback]

God bless

[@pradyumn2692]

Yes. A lot of things were discovered like this. That's what makes science different from religion. It is specific.

[@Woahthatisnotfair]

@@pradyumn2692 fax

[@floorboss]

​@@pradyumn2692Not necessarily, because "Science" can be very ambiguous. See the Covid 1984 exaggeration. > Science can be defined as A group of people in agreement & signing off on A paper that details the degree of consent. While another group can do the exact same thing, while detailing in their paper, A polar opposite conclusion. This happens all the time.

[@_samuelajayi]

Brought a tear to my eye. So beautiful.

[@rattywoof5259]

1:03 - love the way the subtitle writers have capitalised The Force! May it be with you all.

[@joelgilhernandez3070]

I drop a tear every time I see this video...

[@ritvikvaishnav3472]

what's wrong with you BBC why can't you show the video in normal speed huh?

[@huisbaasbob1923]

@Jim Harol I'm no racist but it bugs me that they didn't show it in normal speed

[@miguellama7618]

Maybe to show the fall more clearly... because you know it is on Tv and they were probably too lazy to make a normal speed video for youtube

[@1989Chrisc]

4:14 stfu

[@miguellama7618]

@@1989Chrisc 2:53 stfu x2

[@MinecraftMed343]

It would have fallen at 9.8m/s^2, the drop would be over in a second.

[@Team.Louish]

Wish I could of seen it at normal speed.

[@solaaar3]

+Clint Decker (Louish) you can a bit at 4:16

[@AuroraNora3]

Grrrrrrrr >:( Could have*

[@davisbender6337]

+Clint Decker (Louish) just watch the video at 2x speed lol

[@StanSylvania]

+Nice Try M9 the ball falls faster and the feathers are moved by air at 4:16 watch closely

[@Team.Louish]

+Hoo Dini I hate when I do that.

[@stvrob6320]

Wish they had at least one clip of the entire drop without slow motion video.

[@Sp_vloger07]

Who is come from science and fun

[@TheLyricsGuy]

I get seeing it in slow-mo, but why the hell would the editors keep the viewers from seeing the whole drop at full speed? Wouldn't seeing a feather drop that fast next to the bowling ball be one of the best parts of this experiment? Not really sure what they were thinking.

[@jaybluff281]

Because it's a preview clip and they want you to watch the whole show.

[@wtfvids3472]

a "preview clip"?? at the end??? cognitive dissonance 101.

[@jaybluff281]

Which part of the concept are you struggling with? That this clip is an edited down preview of a 60 minute show or that it's edited to entice you into watching the other 56 minutes?

[@TheLyricsGuy]

Unless I'm wrong, I didn't see it in the full version either.

[@wtfvids3472]

+Jay Bluff What are you talking about, even if that was true why would they show the balls falling at a different rate after they have shown them fall at the same rate just before... Use your head. Don't just kneejerk away anything not fitting your preconceived belief system. Did you even see my video??

[@spreadlove8624]

We have people like these doing amazing things and then we have the flat earthers. The quality of human is so inconsistent.

[@sqlevolicious]

I don't think we should consider such a high-praise as to call a "flat-earther", a human.

[@jam22bear43]

Flat earth is psyops so you can lump them in with people who have legitimate questions. Id like to se them shoot a rocket in there hanging from a string

[@edfae3021]

the quality of human is also subjective. im sure as far as the universe is concerned both flat earthers and physicists are both equal and merely different

[@Will91289]

and we have religious fundamentalists, especially Islamic ones, who want to destroy science.

[@jam22bear43]

Ya we have people asking questions of the established world view kinda like martin luther newtom and people like the founding fathers! I dont. Believe in flat earth but asking questions does not make you a lesser human in fact it can make you a great human you negative troll!

[@ishansheikh3058]

I am an Astrophysicist and I know these kind of stuff very well. But still to this day videos like these make me cry to see physics at this best. Tears of joy rolling down my cheeks.

[@fromnorway643]

That reminds me of Apollo 14 astronaut _Edgar Mitchell_ who walked on the Moon in 1971. He said in an interview once that going to the Moon changed him from having an _intellectual_ understanding of the immensity of the universe and Earth's tiny place in it to having a deep _gut_ understanding of that.

[@AlexZander688]

And then you see flat earther cultists and their failed flat earth model nonsense and it brings tears rolling down my cheeks from comical laughter.

[@merihim666]

can u explain me why feather moved it "hair" at the beggining of falling down? i wonder

[@VivekanandaKF]

@@merihim666 I notice this detail and I don't have an exact answer, but I suppose that this is due not being a perfect vacuum. Editing: found another 2 comments here: 1) "Inertia." 2) "For every action there is an equal but opposite reaction. As the feathers accelerate from zero the parts that you see move are actually still standing still until they are acted upon. While it looks like they are moving up they are actually being pulled down. Once all parts of the feather reach the same speed there will be no movement." My conclusion: the feather is not a rigid body, and the feather undergoes sudden acceleration. The softer parts are flexible, and react to this.

[@SuzukiKid400]

@@merihim666 it’s not a perfect vacuum, there is still a small fraction of air in the chamber causing small amounts of feathers to flutter

[@NaaneVinu]

What amazes me, is when it is evacuated it's so dangerous inside due to the huge pressure difference between inside and outside, it can get imploded in huge pressure. It's just matter smallest hole inside. Also the pressure on the ball, could have broken but its a solid ball as mentioned.

[@_aryacore]

I found this video's link in my 10th physics text book , this is the first time when i felt that physics is so interesting .

[@siddheshvalantino8288]

Bro sister i found in my 11th book page no.79 samachher book tamilnadu

[@haushofer100]

Cox's remarks about the equivalence principle in the end are confusing. Of course the ball and feather are not "standing still". They're falling. But according to the equivalence principle this is locally indistinguishable from as if (!) the objects are standing still. The "as if" is crucial here. The same goes with other inertial forces. Accelerating observers can describe deflecting objects in their frame with newton's laws AS IF there are forces acting on these objects (which, for inertial observers, would move in a straight line). But really, the force (e.g. an engine) is acting on them, not on the objects.

[@NOMADdaf]

I agree. He totally misrepresented Einstein

[@hongry-life]

What if the objects WERE standing still? Many possibilities in media circles and maybe he doesn't lie.

[@celesteceleste6670]

any links for more info on this?

[@youssefbalhas1219]

I came to the comments to find an explanation about the last part because i found it confusing too.

[@anthonypape6862]

Agreed. Einstein was merely saying which objects were falling, and which were not with no frame of reference would be impossible to tell. They would only be moving relative to each other. Or more specifically the man in space being picked up by an elevator that accelerated at 9.8 m/s^2. Would cause the man to not know if he entered a gravitational field or if he was being accelerated by the make believe elevator. As to why everyone is obsessed with dropping paper or whatever and that this was some how faked is disappointing to see. It doesn't matter what you drop. They took all of the air out. Drop a dude with a parachute it won't work. I sure hope NASA didn't spend millions on this vacuum chamber to simply fake experiments.

[@nizambg_yt230Dakwah]

Who's watching in 2025?

[@abel9351]

i loved physics in high school and college. im now a doctor and searched this up out of curiosity. i started crying cause of how beautiful this is

[@TradingJesus]

you cried cause you chose the wrong career 😢

[@sweenytwain7095]

Lmao... You cried over this garbage??

[@omarabdelghany7248]

L

[@mcdk5646]

@@TradingJesushow ?

[@mcdk5646]

@@sweenytwain7095how’s it garbage?

[@Applesgosh]

I enjoyed the one second they showed it in real time. Other than that, what the fuck man? It's so less interesting in slow motion because that's not how we would actually see it.

[@SpiritHawk7]

applesgosh That's exactly why it was presented in slow motion on purpose. In real life, the objects would be falling too fast for human perception to simultaneously 1) track and 2) detect any change in form, such as relative distances of the bowling ball to the feathers, and the feathers moving or bending, etc. You don't get much useful data out of something if you can't properly see change happen; real-time would be an imperceptible blur to the mind.

[@Applesgosh]

SpiritHawk7 Dude we can all tell the difference in distance and speed between a feather and a bowling ball falling in real time. That one second was way more impressive/interesting to watch than watching it multiple times in slow motion. All I wanted to see from this was one full drop in real time, but they ruined it and slowed it down mid-fall, successfully crushing my dreams.

[@princeofdnmrk]

applesgosh you're so right. I ONLY watched this to see something my brain knows as lightly gliding to the ground (feathers) falling as fast as a bowling ball. THAT would be a mind-blowing sight. such a shame - bad editing

[@alfredondatra]

applesgosh Yeah, absolutely with you on the editing. They could have squeezed that one second of real-time footage in for this 4 min epic, but no...

[@madcorbin]

applesgosh YES. I watched this on another site but went to KZbin specifically to see if anyone had made this comment.

[@someoneforone1]

Brian Cox's face is stuck in a permanent smile )))

[@randomguy8995]

@Eric Schmidt no one cares lol

[@elijahcox6920]

I love my uncle 💗

[@stephenjones9746]

@alex gilmour You know he has a PhD in Physics and works at CERN right?

[@jaif7327]

elijah cox no way?!!

[@foodunravelled2836]

That's because his face is full of Botox to make himself more appealable children.

[@AOrr-e4i]

Long time Brian Cox fan! Got the chance to meet him in Tenerife in 2016, at my first Starmus!

[@BartTricas]

I wonder how much BBC had to pay to pump out the air for the purpose of this 4 min video clip...

[@AngelFaudoa]

Bart Tricas I asked myself the same question xD

[@AAO-Falcon]

Angel Faudoa Did you get an answer?

[@calmdown15]

Bart Tricas TBH it seemed like a waste pumping out 30 tonnes of air just to drop a couple feathers and bowling ball.

[@respeezy]

Bart Tricas Haha i was also thinking about all the costs, even when they closed those giant doors i was thinking about elecrtricity costs.

[@redtails]

Bart Tricas The electricity is irrelevant, the facility and the people cost the most!

[@QwertyQwerty-gf7bk]

Plot twist: The feather was a paid actor

[@EthanMastercrafter]

LOL

[@supertechniker11121]

It's probably in reverse

[@fredfarkle6347]

that was funny. OH how the flatards must hate this video.

[@dylankatz1850]

You r a gee also i think the air was paid to dip

[@goldenratio_phhia]

it really does look like its being lowered down using some sort of string up until it comes in contact with the ground though lmao

[@math4fun]

It's incredible how the human mind forget things along the time...For a couple of moments I had forgotten that objects accelerates equally to the ground in a free fall, independently of its mass - and it's more unbeleavable recognise it's exception.

[@quantumchu]

I love to show this video clip to my science students (Grade 7) in class. It is both eye-catching, entertaining but most importantly, convincing! Seeing is believing!! Galileo would be pretty happy with his hypothesis and now is fully tested. Thank you for the modern technology to create the ideal environment (vacuum state). Professor Cox is really a great public speaker.

[@Garmashua]

2:52 Look at feathers. Why it moves that way? Different parts of the feathers moved differently. It should not be that way if it stands still.

[@agerven]

Seeing it over that distance in slow motion is very beautiful. What i like most about it though is touchdown, where: 1. You see they arrive simultaneously at their end destination 2. Mass does matter since the impact of the big ball crushes the landing surface whereas the feathers do not impact it at all.

[@_Burak_54]

yeah as the mass gets bigger momentum gets bigger and makes more damage.

[@lovegachafox09entj31]

POV: your on a teams call and you were set to watch this....

[@emmc2]

Yep

[@Jamesfeldburg]

Yep

[@lucabralia5125]

nope, the algorithm brought me here

[@BestGamer-mk6vs]

lol, yh

[@simplygreat2483]

Lol

[@fluffyvampire2046]

This video was my inspiration to science when I was in middle school, now I’m physics student & I’m welling to complete my studies on this major ♥️

[@jeffreysokal7264]

Probably the best video I've ever seen. I never tire of seeing this. It is humbling.

[@toast1589]

Physics students after neglecting Air Resistance and seeing this video: This whole operation was your idea, don't blame me!

[@PatriotPits]

Air resistance doesn’t play a factor, does it? Clearly this vid shows that it does. But I was thinking about flying from the equator over the North Pole and back to the equator on the other side of the earth. The plane took off we a relative speed of the earths movement at 1000 mph, some how slows down to nearly nothing at the North Pole then manages to regain that lost speed? Also on take off the plane is getting the rotational force of the air on one side of the plane, then once past the pole it’s on the other side of the plane. Do we just not fly over the North Pole due to this? I see pilots keep it simple and assume a “flat and stationary earth”. How the heck can they do that if the atmosphere is moving one way then the next once over the pole? Just trying to learn here. Thanks

[@siddheshvalantino8288]

Yes how u gessed me i would partner to galileo !

[@digitalArtform]

Incredibly annoying that they never show a full unedited real-time drop.

[@YINGAI1995]

ikd OMG I AM CRYING FUUUUUUUUUUUCCCCCCKKKKKKK!!!!!!!!!!!!!!!!!!

[@deanmuhl7417]

They can't because that would reveal their deception.

[@SuperNova-py1ec]

It’s beautiful. It makes me smile every time I see this clip. Yes it was also shown on the moon of all places. Us humans are odd sometimes but hey that’s what makes us unique.

[@isabellind1292]

It was beautiful to watch. As was Brian Cox's brilliant smile, lol! I think the astronaut dropped a hammer (more practical than a bowling ball when you're trying to pack light, lol)!🌌💓

[@SuperNova-py1ec]

I revisited this with some nephews the over day and tried to explain the principles but I think failed as I got confused looks. Should have shown them this video to explain all …

[@ChangWoo1]

I'm here thanks to my physics teacher. Mr.Aykın❤❤❤❤

[@Yunutuber-yunus1990]

Kütle çekim kuvveti, kütlesi farklı olan cisimler arasında farklılık göstermiyor mu yani ?@davidmudry5622

[@PathanPhoto]

I have watched this video numerous times and it still makes me smile and wonder when I see it again. Absolutely brilliant,

[@freddan6fly]

Love Brian Cox enthusiasm doing experiments he must have done before.

[@ebchacon]

...and to think a man without computers other than his own: His amazing brain figured this out is simply amazing.

[@vaughanscott7308]

Its a hoax you idiot. Why is gravity still only a theory?

[@CuRLYGuY170295]

2024 here 🙌 love this visual!

[@00Linares00]

Everyone has seen an object in slow motion falling slowly, yet that's what you chose to show instead of the object that never falls fast falling as fast as a bowling ball. Good job.

[@deego911]

Yes I found that, why not show in real time until the end!!

[@maxyman86]

Because slow motion just shows the same only slower? ​@@deego911

[@kalebbruwer]

How much did you pay those Nasa scientists to pretend that this amazed them?

[@fikri.rahman]

they're great actors though lol

[@kalebbruwer]

陈鸿 uhhh what?

[@merryjman]

I've seen this video a couple dozen times, and it amazes me every time I see it!

[@aidanjt]

Why would they have to pay them anything? They're scientists, they know that would be the result, but it's no less amazing to them actually seeing it happen as expected. It's not like they get to do stuff like this with the chamber every day.

[@kalebbruwer]

aidanjt Ok, that's true. But it still seems a little exaggerated since they just saw it on a screen as well, seeing it in person would be amazing. That being said, these chambers take forever to cycle, so the long wait may have made it much more special.

[@TimpBizkit]

Weird fact, if you drop the bowling ball and feather individually, the bowling ball will hit the ground sooner - by a few planck length amounts of time. The reason is that the bowling ball pulls up on the earth with a greater force, and so the earth will move up to meet it by tiny fractions of a pico-metre. If you drop them both together, both objects fall together, they are pulling the earth up at once and so they will hit the ground at the same time. This is a fun reminder that gravitational attraction is between two objects, but the equal time to hit the ground is the special case of a scenario where one object (the Earth) is much greater in mass, such that the other (feather or bowling ball) is negligible. But on an extreme scale, if you take two of planet Earth and hold them 100,000 kilometres apart, they will fall together more quickly than an Earth and the moon held 100,000 kilometres apart.

[@TimpBizkit]

To make sense of this comment - imagine two bowling balls in space 1 metre apart at rest with respect to each other and not rotating around each other. Because they both have mass, there is a small but present and measurable quantity of gravitational field between them. Two equal mass bowling balls 1 metre apart will come together at the mid-point of 0.5 metres. Now consider the feather and the bowling ball coming together under gravity. The feather weighs barely anything compared to the bowling ball. The feather will experience the same initial acceleration towards the bowling ball, but the bowling ball will barely accelerate or move towards the feather at all. The feather is travelling almost the whole (0.9999 metres) distance and its acceleration towards the bowling ball is less at future points in time due to not being as close to the bowling ball. Now consider a bowling ball and an atlas stone (that strong men lift on TV). Because the atlas stone weighs about as much as 20 bowling balls give or take, when they come together, the atlas stone has migrated only 5 cm towards the bowling ball, whereas the bowling ball has moved 95 cm from its initial position (in the frame of reference that defines both as stationary). When comparing the feather and the atlas stone, the feather travels practically the entire metre and the atlas stone moves only a few microns. You would say that the bowling ball falls towards planet atlas in 95% of the time the feather does - when dropped individually. Now the earth is just a giant atlas stone that has a mass of 6 x 10^24 kg. For ease of calculation we'll say it has the mass of 10^24 bowling balls. When you drop a bowling ball 10 metres, the earth moves up at (10/10^24) = 10^-23 metres (1/87 million of the width of a proton). If the bowling ball is moving at 14 m/s it will hit the ground around 7 x 10^-25 seconds before the feather (the time it takes light to travel 1/4 the width of a proton). For this to be correct, the bowling ball and feather must be dropped one at a time, or else the earth is moved up for both the bowling ball and feather by their combined mass.

[@melonenlord2723]

Yes, but not if they fall together :)

[@profquad]

not really, since they are right next to eachother

[@YusufshaMaricarT]

It was the air resistance in space that was stopping the ball and the feather. Because the mass of the ball is heavier, the ball was pulled quickly by the gravity of the earth because of the higher mass. The second factor is the space resistance, since the air has been removed it means that the space inside is squeezed (like when a plastic bag is vacuumed to keep food fresh) so whether the object is heavier or not, that does not matter, the external pull (earth's gravity) is the same!

[@thetomasklos]

this brings tears to my eyes every time I see it.

[@konstandinose.6695]

Wtf how😂

[@pajo5014]

Why tf

[@duasarfraz3586]

i too

[@h2w25]

Honestly it's the great production value. The music teamed with the slow motion is meant to evoke an emotional response, combine that with the fact that you are clearly involuntarily celebrate and you have tears from observing 8th grade science experiments.

[@ArchangelExile]

I thought that this place was destroyed by Loki?

[@yussi01]

I'm so glad I'm not the only one who recognised this place

[@OriginalPuro]

"I thought that this place was destroyed by Loki?" Why are you asking us what you thought? That's a stupid question, only you can answer what you thought or not.

[@MRSomethin1]

actually Loki rented it to Pazuzu

[@lupreztryson]

Aaah. The first avengers movie

[@randomguy8995]

@@OriginalPuro is this a wooshed comment?

[@XivicX]

This host's delivery is phenomenal sounding, great storytelling!

[@_T0miOka_435]

When they were removing the air, the control room had that rocket launch atmosphere straight out of a movie.

[@JacobKowanetz]

what the fuck, I thought I was about to see the actual full speed drop at 4:15, but then they slowed it down again! Why this slow-motion bullshit, I want to see feathers drop like a rock. Disliked.

[@beijingbond]

The 4:15 clip in real time was with air still in the chamber as you can see the movement of the feathers. Why oh why didn't they show us the full clip ?

[@junaid3419]

Even in the vacuum you can see the bristles of the feathers begin to move once the feathers are dropped. I don't get it. And yeah its such b.s. they didn't show the drop in real time. Also its strange they showed the drop w/ air at 4:15 then cut to the vacuum drop..

[@wrathmor1834]

Because if their is no gravity it all boyance and density shit falls cause it's heavier then the air around it it rises because it's lighter then air around it.

[@TheNinthGeneration1]

Zack Win I believe that that is due to this only being a preview but that's only my guess

[@TheNinthGeneration1]

Wrathmor but what causes the masses to arrange themselves that way?

[@eMBO_Gaming]

I love how flat earthers in the comments can't process what happened here so they can't even decide if they should call it fake or invent some new mental explanation for this phenomenon

[@srezwana1234]

I don't know why but this vedio gives me tears and a eltimate satisfaction which I may not find anywhere else.. Ahh..such a beautiful thing😍 who says physics doesn't have beauty!you just have to feel it.😊

[@wantlessworkless.2558]

It gives a tear in the eye to people who understand what is going on simply because we are seeing the vast universe in action in one small place.

[@RankIAS-t7g]

Same here our teacher suggested this video.😊😊

[@HalcyonVoid]

@4:22 That is why you need 3 points of reference to understand what or who is moving in a space. With only 2, you can't tell if you or they are moving.

[@Rick-the-Swift]

Even with 3 (or more) points of reference you still can't tell what's moving and what isn't. For instance if object A (an apple) and object B (a bird) were both seemingly hurling towards object C (the earth) and even though object A seems to be falling faster than object B, who is to say that the bird isn't sitting perfectly still in space while the apple is moving away and the Earth is moving toward it? Yeah I know- you're mind just got blown again ;)

[@HalcyonVoid]

@@Rick-the-Swift sure you can tell. Compare the distance between the objects and you will know which is moving. In your example, we know earth will be static so compare a to c and b to c to see which one is moving.

[@Rick-the-Swift]

@@HalcyonVoid But we already know the earth is not static and is moving as well. It's what we think we know which causes conundrums, no? Have you ever heard that every single point in space is potentially the very center of the expanding universe? And that if we were to view the universe from any given galaxy- it would seem as if almost every other galaxy were moving away from our perspective? Isn't this an important aspect of Einstein's 'relativity'? If we knew where the so-called 'big bang' happened, we'd know the true center of the universe, and what is truly static, but as it stands you or I could be at the very center and everything else swirling around us. Not likely I know but it's possible I believe, haha Cheers.

[@HalcyonVoid]

@@Rick-the-Swift by that logic, then we could never tell if a car is moving. Obviously we can because we are basing it on a reletive view of the objects

[@manish7512]

I want to see feathers falling at actual speed, not slow-mo

[@ritusachan115]

They would fall with high speed in the absence of air i.e in vaccum

[@alexleibovici4834]

> actual speed, not slow-mo With the actual speed, the fall takes less than 3 seconds and one sees very little.

[@sultans1377]

Nasa from CGI to SLOW-MO

[@ivan_ayala4971]

same bro same...

[@zeh_raaa23]

film sahnesi izliyor gibi hissettim, mükemmel bir şey gerçekten

[@Paulcarrer876]

A suitable video to benefit students. Thanks to the BBC❤

[@dylanando]

sends rockets to space, gets photos from pluto has a damn rover on mars. but seeing a bowling ball and feather drop, thats magnificent.

[@ian-op5fv]

well its a demonstration thats out of reach for pretty much everyone, but its still somewhat relatable (everyone knows how a bowling ball and feathers fall) whereas you can't fully imagine what it it would be like to be in space staring at another planet close up.

[@danielml]

I keep imagining the amount of experiment they do in this huge place. This was a small (but impressive) one.

[@jxdigital]

They actually demonstrated this experiment on the moon too! You can look it up: Apollo 15 Hammer Feather drop.

[@kitcanyon658]

Yeah, that was pretty cool.

[@kitcanyon658]

@Harry Moorehouse : "Who dat?"? Wow, say no more.

[@jxdigital]

@Harry Moorehouse search for “Apollo 15 hammer feather drop” on KZbin, then watch the first search result

[@WildPhotoShooter]

Many of us older citizens saw the feather & hammer drop on the moon in 71.

[@TALAL_QURESHI]

Last words are amazing

[@jgquinton]

They used the wrong clip at 4:15

[@harshsinha12]

That's my question too

[@Adrian-uy5rh]

Lmao

[@leon_brave_racing898]

The feathers repositioned themselves to have heavy end first

[@miguellama7618]

the correct one is here 2:53

[@Lucas-zd8hl]

The feathers are longer, so the tip of them started off longer down than the bowling ball. I was confused by this until I realized it.

[@ugtutorials315]

Thank you sir It helps me a lot to clear concept of gravitation in my class

[@nishantsaxena5110]

That's just gorgeous, physics is amazing.☺️

[@inoz02]

It would be nice if the slow mo was saved for the ending. Real time would be neat to see with out slo-mo

[@umurkaragoz]

2:20 I love how these guys wearing SpaceX falcon 9 and dragon t-shirts

[@moritz2557]

Lool