Astrophysicist Explains Gravity in 5 Levels of Difficulty | WIRED

Astrophysicist Janna Levin, PhD, is asked to explain the concept of gravity to 5 different people; a child, a teen, a college student, a grad student, and an expert.
Levin is the Claire Tow Professor of Physics & Astronomy at Barnard College of Columbia University and author of "Black Hole Blues and Other Songs from Outer Space."
She is also the Chair and Director of Sciences at Pioneer Works, where this video was filmed. To learn more, visit pioneerworks.org/
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Astrophysicist Explains Gravity in 5 Levels of Difficulty | WIRED

[@jenlightenment5001]

Level 1: What is gravity? Level 5: Why is gravity?

[@coolcorman1091]

Level 7: When is gravity?

[@Primo_Kpodo]

I do you one better, who is gravity?

[@aadilghani3556]

@@Primo_Kpodo 😂😂😂😂😂😂😂😂

[@Primo_Kpodo]

Aadil Ghani 😂😂cool you got the reference

[@basqye9]

level six: pass the gravy

[@NPC-kr3cx]

They should've had 6 levels for this video, which goes Flat Earther, Child, Teen, College Student, Graduate, and Expert.

[@callmepotato]

The video would have just been several minutes of the Flat Earther putting their fingers in their ears and loudly talking about NASA photoshopping their pictures.

[@rockboi91]

@@callmepotato "CGI!! Fake!! Faaakee!!"🤣😅😂😂

[@af8499]

😂😂😂😂😂😂

[@karthickshankar1527]

Well the experts in the end were talking about the possibility of a flat universe. C'mon guys flat is not that bad

[@arkke7465]

@@karthickshankar1527 flat universe has absolutely nothing with how a planet is shaped.

[@johns8901]

Her ability to step down and competently explain the topic to a child all the way up to an expert is incredible. It's had as an expert to go back to basics and simplify. She does this incredibly.

[@dennisrideout5459]

She was incompetent tho what goes up will go down just not on earth.

[@amayasonubi2325]

@@dennisrideout5459 What?

[@cluek9780]

@@amayasonubi2325 it’s a (nerdy) dad-joke

[@jaysonwallker1648]

I will agree to some degree, see explanation in my posting.

[@ruinenlust_]

She wasn't all that competent... as a tutor myself I found some of her explanations were non sequiturs or the other way around.

[@pierresauce8307]

"That's such a good question!" is my favorite response to anything I've ever heard. She sounded so genuine, like she just wants to pass along the knowledge and not be superior about it. That's my ideal teacher, wish there were more like her.

[@shashankvats753]

I relate to you 100% !!!!!!! Completely I wish teachers actually used this sentence

[@docbp3929]

Little kid: gravity is easy Full PhD professor: we know nothing

[@josie3757]

😂

[@lepidoptery]

@strafe the less you know, the less you don't know what you don't know. which is fine if you're willing to acknowledge that other ppl may know the things you don't know... and then there's the dunning-kruger effect.

[@ashishjog]

Perfect example of Dunning Kruger

[@name-wh7zc]

@testing nah gravity is just donut earth moving upwards dont trust your uncle hes wrong

[@environmentNow]

This kid is smarter then many flat earther

[@qwertynable]

"So, what have you learned?" - the most terrifying question known to mankind.

[@evolution031680]

Or “Tell me about yourself!” at a job interview.😯

[@pvic6959]

@@evolution031680 ill do you one better: "what have you learned about yourself"

[@mirelkraja6357]

i feel you bro 😂🤣😂

[@joyfuljoy8726]

@@evolution031680 no it’s kinda simple if u memorize what u have to say

[@missymotors]

Omg yes I seriously felt a surge of anxiety when she said that

[@mimos_kitten]

She’s that teacher we all want to listen to because of her passion which makes the subject more interesting

[@NipapornP]

No. People in the most part of our world won't understand her Language! The U.S. is NOT the world, please finally get it!

[@AlfredoNader]

And, also, she's a MILF

[@senorpepper3405]

​@@NipapornP Huh?

[@NipapornP]

@@senorpepper3405 Can you write a whole sentence?

[@senorpepper3405]

@Nii P. if Peter piper picked a pickled pepper how many pickled peppers 🌶 did Peter piper pick?

[@HawthorneHillNaturePreserve]

I love listening to her explain Physics! She is so articulate and explains in a way that allows you to understand, not condescending and her passion is infectious.

[@itzzconnor8011]

Level 7 , gravity explains itself to the astrophysicist

[@samadritamukhopadhyay2709]

you just described the plot of interstellar

[@cha0ticcollector]

I need to point out that I was the 666th like

[@shmuel883]

im not sure you know how deep this is.

[@smazorize]

actually gravity is laughing at what humans know about gravity!!

[@unpocolocorococo]

That'd be a perfect 5/7 explanation score.

[@AtricosHU]

This is a perfect example of "the more you learn about something the more you understand that you don't understand anything".

[@christopherfassett9973]

@robert punu Mate, you are a walking example of the Dunning-Kruger effect XD

[@thomasedwardlawrence9775]

@@christopherfassett9973 lmao

[@ObtainThePain]

@@christopherfassett9973 put him in check boss, hit him with that psychology XD

[@hachikuji_mayoi]

@robert punu that necessity for heavier objects to fall to the ground is literally what we call gravity.

[@hachikuji_mayoi]

@robert punu how does the object know which direction to fall to?

[@JJSijbesma]

I always liked the simple explanation of an orbit as "falling sideways fast enough that you miss the ground"

[@gun31433]

Being told “we don’t have that yet” is absolutely terrifying yet interesting that we are still learning things today. Makes me wonder where technology and knowledge will be in say 50 or 100 years. Cool !

[@owenwaldo]

gravity is still a theory

[@conanotoole]

How is it a theory?

[@hayleygun]

Gravity itself isn't a theory, but we have scientific theories to describe how this fundamental interaction/force works. For example, Einstein's general relativity is a theory of gravity. The theories are tried and tested experiments to explain why and how gravity works. So Owen's comment doesn't make sense in that regard. If they're saying it's a theory in the colloquial sense - that it's a hypothesis/guess - that doesn't make sense either. Gravity is a term we give to a phenomenon that exists. The theories are what we use to understand what's going on, in accordance with the scientific method, etc.

[@owenwaldo]

@@hayleygun it's a theory, not proven yet.

[@hayleygun]

@@owenwaldo ........ it seems like you either completely ignored what I said or you're fundamentally misunderstanding something. Maybe it's best you do your own research on scientific theory and the forces of nature

[@supremebeing6338]

“If you can't explain it to a six year old, you don't understand it yourself.” ― Albert Einstein:

[@knucklesskinner253]

The thing is, he and others still have problems describing higher levels of physics. Tells you a lot about them huh?

[@closethisad3553]

@@knucklesskinner253 Einstein doesn't understand everything just because he is Einstein. Like many others, he faced the riddles of physics, only he was one of the best at suggesting solutions.

[@natesmate6527]

-albert Einstein…maybe

[@p3gun90]

@@knucklesskinner253 I’d expect so he’s dead 💀

[@Clutchbox69]

Teachers: I‘m gonna pretend I didn’t hear that

[@Slashtap]

Beginner level: So this is what gravity is... Expert level: There is no such thing as gravity

[@NoNewfriendss]

within a quantum value in a model .

[@JavenarchX]

Nothing is created, nothing is destroyed...there was the big bang!

[@mithras666]

@@NoNewfriendss Brans Dicke is the way. Einstein himself practically admitted that general relativity could not accurately describe quantum mechamics and thus is flawed. Everyone thinks that Einsten created General Relativity and stopped doing anything, when in actuality he kept researching unified field theories for 30 years. Now CERN and others found some anomalies and ended up with the Higgs Boson scalar field, which was theorized by Einstein-Bose' Condensate. Einstein had to add those because it (His UFT) would've been the same as Nordstrom's theory of gravitation

[@dakshs9528]

Gravity is relative. Just like velocity. That's why.

[@wolfy4734]

@@JavenarchX big bang is just a theory, noone can say for a certain if it happend or not.

[@FuzzyCatapillar1989]

As an astrophysics student in college right now, this was both enlightening and honestly kind of inspiring and exciting to realize that I get to study all of these amazingly mind-boggling ideas everyday

[@axa.axa.]

That high school student had the exact initial explanation of gravity that the 5 year old had.

[@colinthompson2462]

Yes, right? Wonder what that means about how high-school is teaching kids these days?

[@jumpingsloth3963]

Well to be fair isn't gravity a fairly complex subject? I thought the idea is that we understand how gravity functions, how it affects certain objects, but not what it truly is.

[@sadidrahimi]

@@jumpingsloth3963 found the phd physicist

[@mysteryuser7062]

The 5 year old gave a pretty good explanation also

[@MrBeen992]

actually, the high school student was the most accurate of them all. Prettier too

[@chlxe6071]

level one: what they teach in class level five: what comes in the exam

[@mayyyy123]

underrated comment

[@emilyqi568]

HAHAH

[@Scythe6140]

so true

[@chasegraham246]

Oh I see you've met my professors.

[@martinmartin3490]

you're cute

[@myst1c164]

The little girl was actually pretty smart for her age.

[@Angmir]

she was smarter than the "teen"

[@everburn]

@@Angmir exactly

[@veretxnerd983]

Ikr

[@icyphine8593]

Actually I think younger kids are tought more in school, like my little brother is about just as smart as her

[@therealchecho1868]

Xavier Phillips it was actually than idiot

[@winterkeptuswarm]

I love that kid, she has supportive parents who did the experiment with her 💕 Clearly she's being raised in a curious question-asking environment!

[@joejoelesh1197]

The child was really good but I think maybe they should have had two children. The one they had already had a pretty decent grasp of what gravity was. I think it would have been interesting to hear the expert explain it to a kid who knew quite a bit less.

[@jaysonwallker1648]

I concur. Poor choice of 7 year olds, she was anything but average.

[@su3095]

Level 6 - Alien explaining gravity to the Astrophysicist.

[@JC-wr9fx]

S U the nice ones already do that 😉 channeling that Universal Consciousness ♾✨

[@Aditya-dc2mb]

Lmaooooo

[@graffitiabcd]

Assuming aliens are smarter than us.

[@carlosmatos9848]

You and your third dimension. It's cute. We have five.... thousand dimensions!

[@social3ngin33rin]

Level 7 - Morgan freeman explaining how he created gravity and how it works.

[@labiamajorasmask8307]

Astrophysicist: You're a little taller in the morning than in the evening. 8-year-old: Whoa Me: Whoa

[@arno557]

Cuz its the water content in the intervertebral discs of ur spine that makes u taller in the morning. Throughout the day u loose water in those discs so u are 1.5cm (on an average) shorter than the morning.

[@Mohtellawi]

Me, a medical student: Whoa

[@sarpwilliamkugtan973]

Me a 21 yo : 😮

[@Mohtellawi]

@UC2crQiIKa8Ku44TfYmqNdNg Hhhhh I know, but you know something, especially in the field of medicine, sometimes you don't need to face the information for the first time to be caught by the beauty of it, sometimes it is exciting every single time you come across it. I always wonder of how beautifully our bodies are working, especially on the molecular levels, you realize that we are a very complicated biochemical formula that is functioning purposefully, which is just thought-provoking, even if you already know that.

[@arno557]

@@Mohtellawi well said👏👏

[@Annutka]

Wow, this professor's narrative is so captivating. Makes you think about the impact a good teacher can have on their students' lives. I'm a linguist but understood most of what she said. And not because of my science teachers - they were lousy and uninspired. My mom was a physicist and after each boring lesson at school I'd go to her for a proper, fun explanation. Unfortunately, the rest of the class did not have a physicist mom.

[@LB-ou8wt]

I had that exact same thought!

[@nanObytez-kb5ru]

This video had me realize that I'm not nearly as hopeless with physics as I was told by my physics teacher back in school. He was simply terrible at breaking down information. If I had that woman as a teacher 16 years ago I might've ended up studying at an university instead of flunking out of my physics class because my teacher was more interested in getting evidence photos of students sneaking off to smoke rather than actually teaching.

[@toriless]

He was just sitting on the event horizon and spewing information in several directions and not enough flew your way.

[@Olivia-no2hl]

When they got to the expert, those two looked like two science nerds who were so excited to see each other

[@pvic6959]

because they were :P

[@forthrightnight]

Nerdgasm

[@maiawaterson8348]

@@tanishkakakade88 no one said it was a bad thing

[@suivzmoi]

dude's eyes are like 2 black holes

[@comicstrider4851]

Gravity was not the only thing pulling down that night

[@gilshoham9601]

Physicist -> Kid: apple go boom Physicist -> expert: The whole world is a hologram

[@nootmares_2324]

LOL

[@gursimranjitsingh6721]

🤣🤣🤣

[@abenaoseii]

LMAOAOAO

[@tiffany.pixelberry]

Reality is an illusion, the universe is a hologram. Buy gold byeeee

[@Mark-Wilson]

@@tiffany.pixelberry I love you for that refrence

[@susiealavi1425]

If you can capture the child’s imagination and teach effectively a concept such as gravity, while simultaneously evoking pertinent questions and realizations, you have started the child on a lifelong journey of learning. She is an awesome teacher.

[@danluzurriaga6035]

Fantastic review for me. Received my BSEE in 1972 and haven't reviewed temperature in statistical thermodynamics for half a century or considered it to be analogous to gravity in the way she said it. The expert was really good; he should put out scientific vlogs! But I have always loved science, even retired now at age 73.

[@akshatsilakari4449]

The last interview looked like they were flirting in physics

[@anacarolinaoliveira7126]

I was thinking the same hahaha

[@santiagobande7202]

haha same

[@jamesearley8212]

I have totally had those conversations with physics fangirls.

[@neeko4676]

They look like they are totally vibing off each other LOL!

[@Mehwhatevr]

@@jamesearley8212 the best kind of flirting

[@madaemon]

"The Moon actually exerts gravity on the Earth." "Just like how it controls the ocean tides?" Faith in the future increased +1.

[@rebelaqua823]

Some respect for Americans restored.

[@davidkonevky7372]

dude not even I knew that fact until I googled it

[@rebelaqua823]

@@davidkonevky7372 keep learning grass hopper. we all need to.

[@myhlanoelsalsa8690]

@@davidkonevky7372 Dude, it's explained in the first book of Avatar

[@davidkonevky7372]

@@myhlanoelsalsa8690 I haven't read it

[@Lucardini]

I occasionally come back to this video because of the beautiful explanations, last time the penny dropped for me on Einstein's relativity theory during the conversation with the college student. This time around I had a similar experience listening to the conversation with the expert about quantum mechanics and the relation with gravity. Fantastic video!

[@fchrisb804]

This is really fantastic. We would love to see more of Janna Levin sharing with us more of Astrophysics. Really wonderful. Thanks for Sharing!

[@gizbythetime]

Beginner: Gravity is.. Expert: Is Gravity?

[@user-xl8uo9gp9p]

Ohh bhyy maro mujhe!

[@chillingwithceleste4222]

yes

[@Ranboso]

Vsauce: What is exactly... Gravity?

[@inhalergang5811]

All depends on how you answer back

[@broadwaybound42895]

This is the best comment on this video lol

[@eiliatabrizi7316]

Expert talking to 8yr: Yes honey gravity pulls you down. Expert talking to Expert: Yeah, no there is no gravity, we just call it that.

[@jonneexplorer]

The most interesting part of this is that none of these explanations are actually wrong, they are just more or less complete. Even the expert one will not be complete until we develop a theory of quantum gravity, and even that is likely to open up new questions.

[@jonneexplorer]

Nathan Desta I don’t accept that it’s impossible to ever understand it 100%, or that we never will. I acknowledge that we might never do so, but I don’t see it as an impossibility beyond things like the heizenberg uncertainty limit.

[@eiliatabrizi7316]

Nathan Desta yes, but it could take millions of years. And thats if human kind isn’t extinct. In a couple million years, the moon will glide away and there wont be any life left on earth.

[@ksgermania6159]

"at this height (40 km)? You dont see the curvature of the earth" - Neil DeGrasseTyson _

[@jonneexplorer]

bilu the moon won’t be gone before the sun overtakes our orbit. We are talking billions, not millions.

[@ettinakitten5047]

I love how the last two levels felt like equals talking about all the stuff they still don't know.

[@disappointedbutnotsurprised17]

Wow that last expert conversation blew my mind. Never thought I'd end up grateful for taking up the sciences. I didn't understand a thing properly towards the end but at least I can understand the terminology and vague ideas so I'll consider that a win.

[@aditilakhe1445]

why is no one talking about how well mannered the little girl in the first interview was?

[@anacisneros2122]

she was so smart for her age as well!!

[@rororizky8424]

ikr! And the way she talks we can know she's a clever little miss

[@LW-we4zn]

Maybe because only in the US people think she‘s smart?

[@Arlyneya]

🙁 or maybe she’s just smart. Fin.

[@jonmy7]

@@anacisneros2122 She's so smart for my age, and I'm 5 times her age.

[@moolipit]

Level 1-4: "So this is how it's all works" Level 5: "We don't actually understand any of that..."

[@Joyexer]

We surely will never understand anything, because we cant be sure we reached the "end point" of science. But we think, we can always refine our theories... Thats what they are talking about.

[@deepstariaenigmatica2601]

@@Joyexer the quantum theory of gravity will actually be a very giant step ahead, we'll understand a lot of things after it's established. A possible theory of everything

[@user-cq8tt5ek3x]

Mooli Morano lol pretty much

[@eagle3676]

@@deepstariaenigmatica2601 The more you learn about the universe, the more you realise that you don't really understand anything and are just creating models that are a greater level of approximation than the last ones. I doubt we are even close to understanding the true nature of everything and I sometimes question if any biological life will ever reach a level where they understand the theory of everything

[@deepstariaenigmatica2601]

@@eagle3676 No, that's a dangerous perspective to look at these things. I bet you're not an expert on any of these things and are approximating what so many of these novel theories mean. We actually have come to understand a lot more than we did a hundred years ago. With the discovery of chaos theory, scientific theories actually have a bright future. Look at where we are today technology wise and where medical science has come to and we put a man on moon and next is mars and a human made probe is right now outside solar system. These are achievements and we understand a lot better now. Surely, we're nowhere near understanding it to it's full capacity? but we've done progress and that's certainly not a reason to stop thinking and perpetuate this type of mentality. And I don't know why ppl like you think science (physics) is an open book and everything's just supposed to be discovered right away in an year or something, it obviously takes time. We're doing pretty good for beings this small compared to planetary and cosmic scales.

[@lasma.a]

This woman is amazing! I could listen to her explaining things for hours! She has also been a guest on Startalk! I'm glad she's spreading her knowledge in an easy to understand way accessible for everyone 😊☀️

[@hanfucolorful9656]

there is no [easy to understand way accessible for everyone] 😮‍💨😩

[@soodamncolddisabled]

What episode?!

[@KxNOxUTA]

I love these videos! I loved the reminder of the hologram part. I've seen it in documentaries before and it aligns really well with the whole spiritual concept of how existence and conciousness works. The pictures are very similar and I love how old intuition based observations start to get more and more reflected in science.

[@sniperpaddy3271]

The only alignment is the spelling..hologram vs holistic

[@blew1t]

that little 8-year-old girl was so engaged and in tune with the information given to her, her parents should be proud

[@MrGrace]

She really understood everything. It was great to watch 😊

[@aimanadzhan5135]

Indoctrination much.

[@XDflamingdragonDX]

it's scripted

[@poohbearwhitty]

I love that she conducted the experiment to see if she was taller in the morning!

[@Aritul]

She seems like a dream student.

[@sharkryro]

I think the reason the kid came off as knowing more than the teen is because she was less afraid to say something 'wrong'. I'm sure the teen is very good at physics at school but she's intimidated talking to someone whose job it is to study physics.

[@donglebookpromax6405]

Cap

[@lolwhat1633]

@@donglebookpromax6405 😂

[@AJ-vs3yz]

Stop the cap

[@nyxbeddington]

🧢

[@qual4ixe]

How is it a cap if someone is literally saying "I think" at the beginning? It's just a theory......

[@montgomeryscot6623]

I love the "5 levels" concept and series, and have learnt so much, even at that grade school level.

[@mk1cortinatony395]

janna is an awesome teacher and when talking to "level 5" holds her own. The No 5 guy has respect for her too and it shows. He is in love with physics at the highest level and doesnt flinch much. I'd love to see an outtake where shes says " fancy a drink" and without blinking says yes !

[@SalamanderMagic]

I like how the girl at the beginning is so composed and mature in the official interview and then we see a side clip of her screaming at being measured an inch taller LOL

[@TerribleApathy]

You can see the joy of learning in REAL TIME, it's wonderful!

[@melonoire]

Adorable

[@kaya0776]

That’s what I was thinking

[@addie3147]

she still has emotions- she’s mature

[@abduljabbarabduljabbar1910]

ikr

[@Titan-qi9mv]

Level 1: kid show Level 2: youtube video for online class Level 3: documentary Level 4: lecture Level 5: *roMaNtiC nErDs' dAte*

[@mephistovonfaust]

Level 4 isn't university talk... I am a physics student and I can assure you, you do not talk about things but rather just calculate and calculate more. The explanation she gave is much easier to wrap your head around, even with the last guy than it is when you get it explained in university. Usually it goes like this: The professor calculates things and just reads out what he or she is writing. Then they give it a name and a bit of history about it, if you're lucky. After that the next topic is "discussed". You'll have to turn in weekly assignments and they again, are just calculations but the lecture isn't nearly enough to actually solve them so you go online and read about it... a lot. That's where you get most of your information and actually learn about what does what. In short, university talk would be a level 7 or 8 on your scale.

[@AndreasDelleske]

@@mephistovonfaust Precisely. That's one of the reasons I quit studying physics, 35 years ago :)

[@zaddytexas.8702]

@@mephistovonfaust yeah I’m never studying physics

[@sugareddrip1099]

@@mephistovonfaust maybe it depends on the university, professors and such. My professors seem to enjoy explaining a bit more than calculations and such, feels like nerds showing off their interests and I like it. They made maths fun somehow, except the exams which majority failed :^)

[@mephistovonfaust]

@@AndreasDelleske that's sad to hear. It's a really hard degree to get but the topic itself is just great in general. I wouldn't want to study something else tbh.

[@tamgsmith8077]

Truly fascinating. Losing it here at Grad level. She is an amazing teacher. Guess I understand things in an abstract or conceptional level but cannot even imagine demonstrating this mathematically.

[@munene9567]

I thoroughly enjoyed this conversation, on all levels. Thank you!

[@Wynnwins]

I love Level 5 where it's just two people, passionate about their field, making nerdy jokes that 99% of people dont understand.

[@hanntonn2]

It's easy to understand, but also completely erroneous. The fact that some people don't understand makes brainwashing them easier.

[@babelbabel2419]

​@@hanntonn2 By all means, please do enlighten us with your superior understanding of the universe. Such a deluded arrogance must produce some fun output^^

[@Liberty4Ever]

I was waiting for her to ask him what he learned about gravity today.

[@MegaSandyvagina]

Fortunately your here to help us Dr Cooper...

[@vamphunterx]

I'm assuming your also in the 99%

[@claudiavallee2568]

Level 1 : It's easy. - - - - Level 5 : We know nothing

[@kingvince7328]

Ya know, I gotta say as someone who hasn't gone to college yet and learned purely off astronomy articles and youtube videos, I only started learning a bunch of new stuff once we got to the expert part. Pretty proud of myself. I know you dont care but hey, pat on my back 😂

[@informationparadox387]

@@kingvince7328 YEAH,ME TOO...I am a high school student & I know literally everyting upto 4th level...at the 5th level You know better ,I had even heard a very little of it!

[@kingvince7328]

@@informationparadox387 Yeah same here man. Did well up until the 5th level. Pretty much everything they said I was learning new stuff 😂

[@noddye1764]

literally ? u could be verry wrong my friend

[@eloken98]

@@kingvince7328 Same here. Is this a sign that, we three should study quantum physics?

[@mixuaquela123]

The explanation of the relation between space and time in that light speed measurement situation is actually mind-blowing. It made me inuitivitely understand the idea behind theory of relativity :o

[@loktar1234]

It is great to see young people optimistic and curious about the subject, it creates great hope that one day the youth will solve this mystery.

[@Burrning]

That expert didn't move his eyes once during the interview. My mans was staring directly into her soul lmao

[@pricesymonej]

......into her gravity..

[@marinakanargia]

Did he even blink

[@azimologist]

I think he is really excited to talk with her like what is the probability for you to talk about gravity with someone like this in a daily basis 😂

[@FleshGolem420]

I've been to conferences with these types of folks and they're kind of all a little autistic.

[@onyx_vii7808]

@@FleshGolem420 Well for most autistic people, what they lose in some brain function they gain in others. So it makes sense as to why super intellectual people seem socially distant or strange.

[@ivanamatic3136]

Level 1: totally got this Level 2: totally got this Level 3: this is my level Level 4: understood 50% Level 5: i dont know anything about gravity anymore and it looks like theyre flirting

[@uuitgaurav]

Actually bi got every thing of level 4 but lacks little understanding of level 3

[@sujalbagde5582]

Same

[@danielarmstrong2635]

It’s funny because I understood a lot of the stuff of the 5th level just off of watching KZbin. Physics is confusing but once you grasp a relatively difficult concept you feel like a genius.

[@minutoderubik736]

Mr P same I should be 2 but I understand 5

[@chilloha6464]

Mine i can totally understand at lvl 4 and im just a 12 year old kid

[@keiths314]

Totally amazing - such a fascinating discussion. Really gripping!

[@wilmascholte7607]

The weird part is, I lost it somewhat with the relative speeds and seemingly being motionless at the college level and regained it at the phd and expert level. I'm a layman btw who was absolutely abysmal at physics in high school, but has watched tons of documentaries on this. I suppose that I have a weak spot haha. Must be a misplaced elektron.

[@richardwilliamsiv3778]

That first little girl was so impressive, like a little adult. She was so interested and really absorbed what was explained to her.

[@exchi]

My bets are on her getting crushed by the brutal school system and standardized testing along with the gifted program

[@crossdagostino5778]

That's why support system is important bro

[@mustofalionpiranhanilecroc4105]

#STOPASIANHATE Because asian give made technology , gem , vehicle , electronic stuff love asian don't hate asian have benefit stop hate

[@gibbcharron3469]

@@mustofalionpiranhanilecroc4105 We shouldn't love Asian people just because they benefit us. We should love them because they are people, like everyone else, and they deserve our respect like everyone else.

[@faziolifairmont8125]

kids or people in general arent as stupid as we think. its just that we never find the right role model. Parents litteraly suck. There should be an exam for it.

[@erickguessford4984]

"Do you know how tall you are?" "I'm in the fours." I believe that may be the cutest and most endearing thing she could have possibly said in response.

[@lorddog7249]

Taller than 3'11 but shorter than 5'

[@bigidiot5881]

Maybe I've become an old man but I love when they feature kids that are clearly smart and curious on shows like this. It makes me feel like maybe we're not all doomed after all.

[@karna3119]

I thought she said in the forest

[@Blox117]

@@lorddog7249 so it could be 3feet and 11.5 inches then. good to know, idiot.

[@irwNd2]

It really takes time to process this if you live outside the US lmao

[@AG-yh5hi]

Absolutely fantastic. I’ve always wondered why more videos didn’t use this type of format, which is excellent for really understanding a topic (minus the math of course). Keep these coming - I will watch every one!

[@marcosfern777]

Tbh to learn it would be just grad and diff expert panels would be 🔥

[@Philip_Lim]

I wish the teachers at my school way back then were like this. Loving what they actually do and being passionate about it.

[@elijah5516]

When you learn something during the child’s gravity lesson

[@rap1df1r3]

Great, you just learned a lot of nonsense.

[@chavezharding7820]

@@rap1df1r3 How so?

[@superewa1000]

Killumination replying because i want a notification when you reply

[@ArrowedDragon]

LMAO

[@astroboy890n]

Killumination replying because I wanna know some other flat-earth theories

[@TheBlarggle]

Level 1: Gravity makes things of any weight fall at the same speed! --- Level 5 : Reality is just a hologram projected out of a black hole.

[@OrangeC7]

"Reality is stranger than any science fiction novel" - Some science fiction writer I don't know the name of

[@RabblesTheBinx]

I was a little annoyed that she ascribed that bit to Newton when it's literally what Galileo Galilei is most well known for. Before Newton was even born.

[@RabblesTheBinx]

@Im Zeichen der Wahrheit that's not the point. Galilean and Newtonian gravity models aren't the same thing.

[@jumpander]

'maybe'

[@Vousie]

​@@OrangeC7 I've always found the full quote to be even more fascinating: “Truth is stranger than fiction, but it is because fiction is obliged to stick to possibilities; truth isn't.” ― Mark Twain

[@jessebirch177]

Love seeing this enthusiasm in educators! Beautiful. I learned a few things too :)

[@florianopolis6299]

My heart kinda made a leap when the little girl realized stuff and was fascinated by those discoveries...I see that in my own kids...most beautiful thing ever.

[@loucam7570]

Me, a physics student, listening to the grad student: yeah yeah of course. I already knew that. Me listening to the expert: holowhat

[@samhayashi9801]

hololive

[@captlevi1111]

Same😂

[@juliamay8580]

Lol, same 😂😂😂

[@ammaryasir5810]

Same.

[@unicornknight165]

IF the whole world is a hologram, then WHAT is dimension? Are we just 2D objects? I cannot fathom a world like that!

[@CommunityInspire]

Astrophysicist: What did you learn today? Me: I learned that I am as intelligent as a child... 🤔

[@DM-qd7gw]

EZ fix...read a book. All the info up until the expert is learned knowledge. During the expert portion they discussed theory.

[@dingusmcscrungophd5219]

Same

[@Vordigon1]

7:24 asked my University physics teacher the same question, she couldn't answer the question. We need more teachers like this astrophysicist*, make it interesting and fun to learn and explore the environment we live in :)

[@roflbbqlolwtf]

Intelligence as a measure actually doesnt vary that much between childhood and adulthood ;)

[@raycemyers682]

Mike Hoang I feel that😂

[@bobbyagee3796]

When mentioning the square inverse law it sounds more like atmospheric pressure. For the effects vary due to matters relation to a solistrial body. The force/pressure isnt a pull in relation to the source but is being acted upon in all directions (to include internally). ie. An inflated sphere.

[@totallyrealreactions5023]

Physicist: “when you’re standing, or walking, or sitting, the gravity contracts your spine-“ Child: **visible concern**

[@HINATA13845]

I noticed that too!! 🤣🤣

[@shreyah9938]

i made it 1K lmao

[@Defender78]

14:20 "Imagine if your'e in an elevator, and the cable is cut... you'll float!" gee what a happy example!

[@faismasterx]

@@Defender78 How is that a happy example? That's terrifying. LOL

[@jone1700]

lol

[@salt407]

“You are a little bit taller in the morning.” People who are 5’11”: finally a chance to shine

[@ceres4478]

Turns out your 5"11 in the morning

[@blink-reveluv-my6875]

I’m 5”5 in the morning what would I be in the evening?

[@XCutie782]

@@blink-reveluv-my6875 1

[@rineaguirre4768]

Finally

[@mineeagle2651]

Im sorry i dont want to see small brain measurements

[@vicg5323]

Awesome 👏. Interesting to see at what level of study you must be to have deep conversation on the subject. Did not know about the neutron stars collision creating heavy elements. Would love to get some of that gold! Nice to know that the Heisenberg theory is responsible for blue screen of death. Will pass that info on to my clients. 😝

[@ivaneil]

This is what I call great teaching skills. Thanks for sharing this Dr Janna Levin

[@turkeybacon1199]

The last guy is giving major final boss vibes. I was half expecting him to communicate telepathically.

[@nevaidhyasingh4323]

lmao

[@AaronEbrahim]

bwahahahah

[@stanleyhercules]

Dude's face just says "I have seen the inner workings of reality" fr

[@saulramirez547]

@@stanleyhercules bruh Same, he had that look on his eyes

[@NickKlauss]

@@stanleyhercules he looks like he is the older uncle of Thanos

[@alyciagilb1643]

are we going to ignore how smart and eloquent this child is for 8 years old?? wow

[@360.Tapestry]

as an adult, even though i understand what was discussed, i would not be able to repeat it in front of an expert and cameras lol

[@cashkurtz5780]

i was level 4 by 9

[@zapstarfr]

@@gracieporter7148 yeah yeah stop bragging

[@petermarais4168]

@@gracieporter7148 I don't want be that guy buuuuuut r/iamverysmart

[@hikonz4247]

@@petermarais4168 r/ihavereddit

[@BladeofTime4400]

I love how simple (externally) it sounded when they were talking with the college graduate about the neutron stars :) To be honest, I lost it somewhere around the middle with the high school girl, haha 🤣

[@toriless]

I get them all but the last guy never explain anything. I had to go elsewhere.

[@MarcPhilipGoodman]

Incredible! The true gift of a genius is in their ability to express things so that people at any level can understand them

[@lunarusdust7227]

Level 5: Expert The astrophysicist: *why do I hear boss music*

[@kingslayer3365]

😂

[@brutechieftain9321]

🥴 I'm in danger.

[@danielpustlauk6986]

BOSS fx Pedals prolly ;)

[@comebackkid44723]

At last, a worthy opponent!

[@quesadillalover3138]

This “child” is smarter than half the people in my physics class

[@Jessica-ne5pr]

and probably more fun to teach

[@naledi5332]

Yes

[@ronray3293]

The child knew *way* more physics than the gymnast 🤣

[@simmerke1111]

@@ronray3293 Not to mention they gave the same explanation when asked at first. 8 years of American education for ya.

[@Novafan]

are you in the special ed physics class or something?

[@prakalyam9782]

Where they started and where they ended.....Just mind-blowing 🙂

[@Gumby518]

Thank you for this insightful video. I appreciate how well each person communicates their understanding and perspective. Also, I'm all about those nerd jokes near the end.

[@giovannitorres9337]

I swear the last 2 were just flirting in physics talk

[@user-jo3go8fe3g]

It was a dream to watch

[@AurorXZ]

I'm surprised I had to scroll so far to see this-I instantly picked up that vibe when I saw how he was sitting, haha. That intellectual chemistry is a life goal.

[@the1337fleet]

Just look at the last guy staring at her...

[@JackofEire]

YES! THANK YOU! It was immediately obvious! Lmao!

[@ro1995]

i think she might've been uncomfortable with his glaring tho....

[@orions1943]

This is so amazing!! I have a passion for this type of stuff astronomy and astrophysics. Every time I learn more it's mind blowing. I love all the sciences really.. She explains everything so well. 😁

[@spakeface9752]

Astronomy and astrophysics are NOT science

[@jetpond7904]

@@spakeface9752 they are though. Sorry.

[@cristinadecisneros3987]

i love how it became more of a conversation between colleagues when it came to the grad student and the expert

[@blackphantom21]

The expert has no light behind his eyes, only math. I love it

[@kevinkline7242]

Its good he is a physicist because he has the stare of a serial killer.

[@acedcoffee6934]

Why do y'all say he like.. isn't the expert a 'she' here?

[@acedcoffee6934]

Oh lmfao I'm so sorry, I didn't watch it till the end and thought the astrophysicist was considered an expert

[@kevinkline7242]

@@acedcoffee6934 You are also right. The woman who was the moderator is a PHD in astrophysics .

[@MisterNarrador]

well, human math is what describes the Universe, under human capabilities, in reality, the universe doesn't use human math. math ends when it meets chaos. but in the real universe chaos does not exist, only order.

[@anamica4766]

Level 5 : Here is a tutorial of how to flirt in physics.

[@alejandrogonzaleznevado1672]

Same that I thought. There was a lot of chemistry in that conversation... And they seem a bit nervous. It looked like flirting definitely.

[@foopo5004]

Pretty sure it wasn't chemistry

[@foopo5004]

Twas physics

[@Elias-gj8tc]

It scares me how hes looking in her eyes for the entire time

[@theokllama3047]

@@alejandrogonzaleznevado1672 She touched up her lipstick too. I saw the brighter color and had to scroll down to the comments to see if anyone said anything about it.

[@ThomasQuinlan17]

I had the pleasure to see Janna Levin present as a guest speaker at Winton Capital in London. She was part of those gravity wave detection experiments she talks about in this video. It was a fantastic experience and to see how humble yet engaging she can be both in person and in this video!

[@monsterod78]

She's so supportive to the child when she's asking questions

[@marwaalawadhi236]

As a med student, I can only understand the child’s explanation level.

[@kelsey2333]

Ok this makes me feel better cuz SAAAME. Lol

[@usernotfound232]

AND this is the reason why I'm choosing med school lmaoo

[@kiwibean6]

Why?

[@kelsey2333]

@@kiwibean6 Your name and pfp makes you seem like a kid so I doubt you understand it any better. Also, your asking "why?", that's such a weird question to this comment. Lol

[@loon7181]

@@kiwibean6 why not?

[@rowel_patdu6551]

The way the expert stare at the astrophysicist lol "finally a worthy opponent"

[@miloimadalinamihaela9037]

Or a worthy collaborator 😎

[@rowel_patdu6551]

@@miloimadalinamihaela9037 or a worthy girlfriend haha

[@sebastyann123]

@@rowel_patdu6551 I ship it

[@rowel_patdu6551]

@@sebastyann123 same here!

[@abidshaik8263]

Our conversation will be legendary

[@odalesaylor]

Great descriptions. My favorite part was that I was able to follow it all.

[@Jay-ft3xh]

It's beautiful watching children engage in intellectual conversation.

[@sulyanasamuel9010]

thats crazy that it seems to be so weird that the way you converse on the yt comment section app is so SAD like ohio losers😂

[@princesslola1234]

I love how the level 5 was literally just them having a discussion about how much they don’t know about gravity 😂😂

[@gregoryjones9506]

The simple fact is that we understand the rudimentary physical repercussions of gravity, not how those things manifest. Just because you can drive a car doesn't mean you know how every part of your vehicle operates.

[@Sasukej2004]

@@gregoryjones9506 in this case it should be, you can drive a car, you know the parts and how they interacts, but don't know the quantum level of the interactions. Because we know gravity on terrestrial and celestial scales, gravity on moving objects, gravity on very fast objects, but our current model breaks down on the very small level, in the centre of a black hole for example.

[@chesternaire242]

"The more you know, the less you know."

[@Brukernavnn]

That's how it is. When you don't know much, you don't know how much you don't know either. When you've learned much, you have also learned how much you don't know. This is why fools think they're experts.

[@princesslola1234]

TonyMac I believe it’s called the Dunning-Kruger effect.

[@Judas_Krimson]

And then there is Level 6, at impossible difficulty: Explain gravity to a flatearther

[@GrandEWN]

Na that's level 0

[@splash8429]

They be like: IT'S JUST A THEORY

[@psychott6]

It takes so much self control not to say the next line

[@hulkhatepunybanner]

*The fifth level literally talks about the universe being 2-D and that 3-D is an illusion.*

[@reponteann1602]

Hahahah

[@Claudia-pm7wg]

Hearing the Experts talk is like a meeting of minds and the exchanging of ideas. It is fascinating.

[@XxskidudekidxX]

This is gold. I love what this channel does. THANK YOU

[@sulyanasamuel9010]

god bless. have a great day my nikka❤luv man

[@ZeroCommentsZeroDocs7Bugs]

Baby: q.... q.... Mom: He is about to say his first words ! Baby: quantum mechanics

[@jampineda2594]

😂😂😂😂😂

[@Star-rq3jd]

Actually the baby doesn't exists!

[@jadensmiley6297]

All baby’s will say this as their first words until we observe them.

[@ASLUHLUHCE]

Hahahahahaha

[@mccarthy3381]

Parents:honey call NASA

[@ScottCaldwell]

The expert looks like someone who has gladly sacrificed normal human emotion to make more space in his brain for space stuff.

[@heee302]

Lmfao yeah

[@atulkotian]

Or he got a Botox 😂

[@dorkmax7073]

Wouldn't we all

[@nataliamoura7743]

😂😂😂😂

[@gaminawulfsdottir3253]

That flat affect is what someone looks like who is really paying attention. Which is why it doesn't look like what we call "normal."

[@andreameigs1261]

24:46 and the most frustrating part of being an undergrad is knowing there is a question to be asked, but knowing you don't know enough to formulate the question, and not knowing what questions you need to ask in order to get the information you need to ask the question.

[@Spectoral_on_SPOTIFY]

That bit about how the whole universe may actually be two dimensional because of the maximum amount of information being what can be packed onto an area, ie: an illusion of volume, really blew my mind and I had to re listen to it like four times before my eyes didn't glaze over.

[@jawadahmed2138]

Meanwhile in Parallel Universe : *Apple hits Newton's head* Newton : Understandable , Have a nice day.

[@avu2888]

UNDERRATED

[@kellanfeng]

Way too underrated

[@RM-my8kw]

100th like

[@navidab2005]

best comment

[@sumantoterkilir7100]

@robert punu and why our earth didn't fall down?

[@aery3854]

The coolest part for me is how, as she reach the grad student and expert, she was no longer just explaining but also asking questions. That is a sign of real intelligence

[@jordanbourke8368]

@@johnbiluke8406 said like somebody with no intelligence

[@johnbiluke8406]

@@jordanbourke8368, We still barely know anything about intelligence, so just take IQ with a grain of salt.

[@johnbiluke8406]

@@jordanbourke8368 This just sounds like a hate comment, not a learning opportunity.

[@chiot2875]

@@johnbiluke8406 clearly intelligence is a social construct, what was your intention of posting this comment? Being a social construct doesn’t invalidate her sentiment or add anything useful to the subject, and as an observation it’s off focus

[@johnbiluke8406]

@@chiot2875 Just informing the commenter.