The Arrow of Time - Wonders of the Universe - BBC Two

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Professor Brian Cox uses the Perito Moreno glacier in Patagonia, Argentina to help explain the Arrow of Time; a concept that tells us why sequences happen in the order they do.
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[@robertfindley921]

Huge fan of Brian Cox. He brings a child-like wonder to his content. I always learn and enjoy.

[@itsmylife8639]

Other than Physics there is one more thing that I like about Brian's videos, the beautiful nature that his videos shares. Just amazing.

[@moxica6478]

+Saurabh Banerjee also the musical score they use in his videos compliment the videos well

[@AjarnSpencer]

he is the david attenborough of the 21st century, with the difference that he is qualified in multiple topics from genetics and chemistry to astrophysics, and has done a lot to make new and emerging sciences and the scientific knowledge of the present day, interesting to the younger generation

[@J5X7]

He's a pillock.

[@shack8110]

isn't gravity a law that states ice can not go back up and affix itself again to the glacier?

[@christosmakariou4574]

ITWORKS IN REVERSE TIME AS WELL SO THAT'S A NO.

[@marykeohane200]

It’s official ... I’m obsessed with this brilliant dude & his soothing voice 🥰

[@stevie5595]

Haha same

[@libville]

This guy is fantastic. He makes physics accessible by employing these amazing explanations that use our natural world as a prop, albeit a beautiful one. Hats off to the BBC for supporting these sorts of programs. BTW, is there really any need for anyone to disparage or get competitive with other countries about their documentary content? Really?! There are wonderful documentaries made the world over by people just as dedicated and talented as Brian Cox, so let's enjoy them.

[@ploptart4649]

I'm sure it's very scary to hear in person, but on video the sound of the collapsing is pretty soothing, actually. It's like listening to a thunderstorm.

[@franciswheatgerm2082]

He also taked about something else apart from the ice collapses. Glaciars make a very powerful and distinct sound when they move - also because of all the echoes they trigger. The first time i heard it i was all alone in one of the ice tentacles of Vatnajökull, in Iceland. For a very long moment i felt like reality had been stolen away from under my feet. The sound was so strange and unconceivable that i had no common reference to explain it. There was no time, no reason, just a mix of fear and irresistible wonder. It's like a crackling howl, like a mixture between a thunderstorm and a whale chant, that can last for many seconds - from my own humble experience, in one segment of a gigantic glaciar. Brian heard it, you can see it in his smile :)

[@cannedmusic]

I love watching Brian's presentations. It's like watching a kid in a candy store gleefully explain to the workers how candy is made, the hardening point of rock candy and the thermal temperature needed to achieve the crystallization of sugar and corn syrup-how, not enough will result in a somewhat mushy substance whereas too high a temperature can lead to burnt flavor or candy that's too brittle and won't harden properly, how it only takes one or two degrees of temperature to differentiate between the two temperatures, sometimes...and then, out of nowhere a team of Ice Warriors pop up from one of the glaciers and take Prof. Cox captive.

[@debbietimm9397]

I could listen to his voice explaining the Wonders of The Universe for eternity 😀 So relaxing!

[@johnathanw2565]

Brian Cox is the greatest Teacher, Presenter, Thinker, Soothing voice and friend there is...

[@Ravakeksis]

Brian: Now thats something you'll never see in reverse Christopher Nolan: Challenge accepted!

[@vitalalive69]

What he is telling is actually what we all know and 0have known for a long time now, nothing new to anyone. But the way he gets the message over is simply brilliant and epic.

[@moxica6478]

Such a great series this and the wonders of the Solar system. I don't know what I like more, the cinematography, the music or the way he makes everything understandable.

[@AnikHalder]

From what I could make out, Arrow of Time = Second law of Thermodynamics in terms of entropy(disorder). In other words, Universe likes disorder and time moves in direction of entropy increase. Prof. Brian...Hats off to you as always.

[@RtB68]

Remember, disorder is a human definition...I'm sure the universe thinks it's quite ordered, thank-you very much.

[@naomisbrainjunk578]

@@RtB68I’ve heard it described as energy becoming more spread out, like through friction or low energy heat radiation :0

[@Primaate]

The definition of Genius - to solve and reveal the complex, simply. Well done BBC and BC.

[@saadsalman1650]

How is it that I have been watching Brian Cox since I was a kid and now I am a grown man and he hasn't aged a day?

[@sergifernandezmiranda1311]

probably he looks after himselff very well

[@andrewsymons6808]

Time doesn’t pass for Mr Cox. He is eternal.

[@robbhahn8897]

Time traveler

[@alexanderhopkins2807]

I went to see that glacier on a warmer sunny day. A fabulous spectacle. 🤓

[@arnobghosh265]

I really really loved this tv show. These gave me a dream of becoming a scientists. Thanks to BBC and Brain Cox. Hope in this year i mean 2018, there will be another tv show like this.......

[@ezequiels3293]

I live close to that park, one of the purest airs i ever breathe for sure.

[@nicholasmrobinson]

"...we all age..." - do we Brian? I know I do.

[@sinprelic]

this video is about the second law of thermodynamics. too bad BBC only uploads these snippets!

[@PatRedstone]

Love the BBC - thanks for posting this.

[@antonio_luis_]

Big Brian Cox

[@toonu]

"glacialy slow" is the new description I will be using for my workmates.

[@Freedomlooker]

I was just thinking about that!

[@kalidouba7706]

I really like your videos, they are great and simple. I only pick the ones where you are casual.

[@LizardYup]

Sweet! I love everything about the universe, so beautiful. :) And Brian Cox, you're a legend ;)

[@typim]

wow, those are deep thoughts! appreciate it!

[@thealmightytiddles5427]

Beautifully poetic in a way isn't it?

[@musicshanky]

amazing is the word!!!

[@gustavoritterstein4644]

Simple, yet very profound

[@reinforcedpenisstem]

Beautiful.

[@scurrie42]

Superb...

[@elliebrown181]

Amazing photography

[@johnniemjamaica3089]

very nice my friend I like it

[@TheMightsparrow]

Things can only get better ✨

[@helipeek2736]

“1000km that way is the Antarctic and today it feels like June in Wythenshawe”

[@chrisgriffiths2533]

Amazing Glacier.

[@patrickmayer9566]

,,,,,,,,,,,,,,,....... . . . Always watching here ! ......from land o' lakes,wi........DooooooooooD ! .....the best!

[@ausria9swan]

So true.

[@ivanpostnikov5517]

that's my favorite science series for sure

[@RelDavi103]

Awesome

[@wkb9683]

Things can only get better 💓

[@manibharathy1994]

Things can get only worse. Thats what he is saying

[@OutlawXplosive]

This didn't age well my friend xd

[@vigneshrb1626]

Brian Cox:"There's nothing in the laws of physics that prevents the ice from jumping from Lake and gluing back to its original place" Chris Nolan: that's great!!

[@arboldechorizos]

Hey, is there any chance to get this fragment subtitled in spanish??? it would be great to have this amazing quality content available for the understanding of a wider audience. I can help if given the opportunity!

[@martinleck]

Time exists because of a singularity that occurred billions of years ago (the big bang). Before that, our entire universe was smaller than a pin prick but contained all of space, time and matter. It is the most highly ordered state known to science (or you could say it had the lowest entropy ever known). Then something happened inside our tiny, highly ordered universe that gave particles mass. We don't yet know exactly why it happened yet (possibly due to a very slight imbalace/spin in the universe's highly ordered particles interacting with the Higgs field) but we do know that it gave birth to both time and space, releasing incomprehensible amounts of energy in the process. The energy, motion, time and space created all move from a highly ordered state to a lower ordered state and eventually all energy space and time will dissipate from the unvierse. Entropy calculates that this is the most overwhelmingly probable outcome. At that point, all possible past present and futures will coexist simultaneously and time will have no meaning. So it's true to say that entropy and therfore time do exist but the past, present and future are just explanations of how we humans perceive the universal forces that change matter to a less ordered state. Its just dumb humans... observing entropy... relative to us.

[@Muradsahar]

Reminds me 2011, early teenage years.

[@jakemorrison8507]

Can anyone point me to the video where Brian Cox references somewhere in spacetime is 'your first Christmas with your grandparents' long shot, but if anyone has a vague idea of what I'm talking about let me know please

[@Ken7663]

I remember once seeing a documentary where an arrow in flight was used to illustrate the forward movement of time. Any responses ?

[@S2Cents]

Brian Cox is living up to the legacy of public science teacher of the great Carl Sagan I think.

[@redmigold370]

I'm in love with this person 💞😍😍

[@RobinOfTheWest]

Entropy prevents water from jumping back up and reforming into the glacier. Things always move towards a lower energy state.

[@Andyachinhead]

2:44 Hell yeah!

[@alistairhales9179]

This separation between Past, Present and Future is only an illusion - Albert Einstein

[@pseudonymousbeing987]

Only a stubbornly persistent illusion* is the correct, full quote.

[@kephalopod3054]

The present is the most phenomenal illusion.

[@dennisgalvin2521]

"It's just the present we're in that's always changing that seems to make time appear'

[@craigrobinson8160]

I think I would enjoy him telling me off lol , Could listen to him all day..

[@arpitkulshreshtha3513]

4:27 is where idea of Tenet was born!

[@2007Jordan1991]

yea thats exactly what i was thinking thats why we have waterfalls not water rises but im sure he has some sort of explanation for it he's the man

[@srinivasagan]

Change is permanent and irreversible. How true and universal!

[@davidbobbiejohnson6214]

Fascinating my name is Bobby Johnson

[@protic4]

Add to bucket list: see glacier.

[@stizzulka]

cool.

[@jakemiller7682]

everyone in awe at this guy - the way he talks and makes amazing videos - oooh aaah - unfortunately they fail to see - he's wrong

[@8nansky528]

I ADORE READING

[@AppleAssassin]

I used to travel in time, but then I took an arrow to the knee

[@TheInfinityGhost]

Anyway - America isn't too bad with it's own shows about nature and the universe, but I do agree that there should definitely be more consistent programming, not just one show about the universe and then 10 showings of "Ice-Road Truckers"

[@aabmmd]

got a link?

[@virginiaconnor8350]

"The Vulcan Directorate has determined that there's no such thing as time travel " Sub-Cdr. T'Pol

[@chrisroor]

@luckyluke013 And that's what makes entropy so interesting :P

[@stilettosandshades]

@arna11420 totally agree... (whispers) and I'm an American...

[@SuperBrma]

hoi leuk filmpje man:) xx emmy

[@arnorrian1]

@callumdoyle2 Not just you, everybody is. They're the global standard of quality

[@GreenAmigos]

@VerucaBucket Maybe DireTheDecadent is the Host's KZbin username, and your comment about James Blunt really got to him... it would to me!

[@stilettosandshades]

@jegr38 haha - damn you were right. you probably didn't even see how right you were about that....

[@mrityunjoysen10]

4:22 Nolan's behind the camera cameo.

[@MohammedAhmed-yo8pe]

After Sir David Attenborough Brian Cox defo has the best narration voice.

[@danielsmartie]

urrrg the way he keeps saying glacier hehehe

[@inox1ck]

I think, we don't see things in reverse because of the laws of physics not because time goes in one direction. At some point some things may appear as happening in reverse but the same rules hold as before. The world is a made of fields that propagate like waves and interfere or interact and emerge or collapse.

[@aluisious]

@Graham6762 Frontline and Nova. What are you talking about?

[@TheScottoline19]

This guy is today's Sagan

[@vargasbasti]

Though Perito Moreno is an Argentine glaciar, Northen and Southern ice fields are Chilean

[@sundareshvenugopal6575]

If there was no change in state would there be time ? If there was no activity at all but perfect endless stillness, would there be time, or the passage of time ? Are all these changes caused and brought about by time ?

[@luckyluke013]

Its the extremely simple and basic stuff that dumbfounds me, like how destruction of an object can be put into entropy and a mathematical equation. I just think of it like its just there or just happens. Never thought why. Its like asking what the definition of "the" or "is" is.

[@Kenneth_James]

As far as I'm concerned, no other man should be allowed to talk about science and the universe. Only Professor Cox.

[@swimon]

There's nothing in the laws of physics which prevents the ice from jumping out of the water and back onto the glacier ? Gravity, maybe?

[@davidwinfield4948]

Iv got a Question.....? But in a Multyverse Could there be not only the posabilty but the Probability of A universe running Backwards ✨.?....?

[@hackajim]

in this episode he said order to disorder.... light to dark, the universe will burn out into stale dark... but in the next he marvels at the "endless cycle of life" you cant have it both ways pal.

[@leapsplashafrog]

When he says the universe ends in disorder I think he doesn't mention that another infinitesimal can open up and another cosmos can begin again. Maybe this has already happened before... What if there's no end?

[@dylan110896]

Do you have the science channel?

[@aluisious]

@daeamarth Part of the whole deal is that the entire universe is aging irreversibly. It's not a continual cycle. Eventually the galaxies will drift apart and no galaxy will be able to see any other galaxy. Stars will generally all become old and cold, with very few new stars born. You could say that even now we are at the stage of the universe where no new galaxies are formed, they only collide to form amalgamations, and one day even that will stop.

[@bipinshahi9830]

I need here my palace

[@stilettosandshades]

@jegr38 i just meant that im sure you didn't come back and see the big huge argument that started between cruelty2 and the other person commenting after you left your comment.... But, good definition of trolling :)

[@arbonne1805]

You can throw all the phyisics known to mankind into explaining this arrow of time malarkey, but it doesn't explain the paradox of how Prof Brian Cox fails to age.

[@1800ghostdance]

THE GLASSIER

[@phat1234]

change is the only constant in the universe... sadly we and things around us must adapt or perish....

[@Luke-ev7vz]

There are multiple physics constants...

[@Yusuf1187]

I like Brian Cox, but tbh in these clips I'm watching from this show, he actually explains very little. Sometimes he never explains anything. Like in this one, he just rephrases that time goes in one direction as the explanation for why time travels in one direction. Just saying that events cannot be undone isn't an explanation of why. It's just rephrasing the issue I thought he was going to provide an answer to. To anyone who has seen the full show - does he actually explain the answer to these things? O is the whole thing basically kept so simple for the masses that you never feel like you've developed a greater understanding of the issues?

[@patmercado8145]

It's been a year, maybe you've seen the full episode already. Anyway, I just recently rewatched this and yes he does explain it further by discussing entropy in the next part.

[@mark-ish]

@@patmercado8145 the (typically) desert scene eh?

[@patmercado8145]

@@mark-ish Yes lol. Is it typical? I'm a chem major and that was the first time the desert analogy was presented to me. Profs usually use "your messy room that won't make itself unless you put effort” analogy 😅

[@stuartparkinson6061]

Time is responsible for the existence of matter,, one of the major factors is a positive infinite number. Time is a reassertion so a past is known, movement isn’t required.

[@llIIIIlllIIIllI]

what is a glassier?

[@chrisroor]

@hackajim The universe does move from order to disorder. He talks of the "endless cycle of life" because the unimaginable scale of time makes it seem as if it is endless. The "heat death" of the Universe will theoretically happen in ten trillion, trillion, trillion, trillion, trillion, trillion, trillion years. Human beings can't really comprehend that amount of time.

[@rsvcaptin]

Me watching these 5 minutes videos ive become cleverer than my teacher

[@porkybutthole653]

is anyone else bothered by the vigentte effect on some shots

[@dowelly450]

Wooo :D

[@metaltyphoon]

I WANT TO SEE MORE THIS AND LESS REALITY TV SHOWS !!!!!!!! ARE YOU LISTENING USA ????

[@joanmanalang8375]

He kinda look like the Australian stand up comedian James Smith :)

[@LiamDoyle9]

@callumdoyle2 something about your surname is familiar