The Arrow of Time - Wonders of the Universe - BBC Two
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- Опубликовано: 20 окт 2024
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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.
#bbc
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Huge fan of Brian Cox. He brings a child-like wonder to his content. I always learn and enjoy.
Other than Physics there is one more thing that I like about Brian's videos, the beautiful nature that his videos shares. Just amazing.
+Saurabh Banerjee also the musical score they use in his videos compliment the videos well
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
isn't gravity a law that states ice can not go back up and affix itself again to the glacier?
ITWORKS IN REVERSE TIME AS WELL SO THAT'S A NO.
@@christosmakariou4574 what about entropy?
It’s official ... I’m obsessed with this brilliant dude & his soothing voice 🥰
Haha same
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.
Brian: Now thats something you'll never see in reverse
Christopher Nolan: Challenge accepted!
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.
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.
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 :)
Brian Cox is the greatest Teacher, Presenter, Thinker, Soothing voice and friend there is...
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.
The definition of Genius - to solve and reveal the complex, simply. Well done BBC and BC.
I could listen to his voice explaining the Wonders of
The Universe for eternity 😀 So relaxing!
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.
"...we all age..." - do we Brian? I know I do.
this video is about the second law of thermodynamics.
too bad BBC only uploads these snippets!
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?
probably he looks after himselff very well
Time doesn’t pass for Mr Cox. He is eternal.
Time traveler
I went to see that glacier on a warmer sunny day. A fabulous spectacle. 🤓
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.
Remember, disorder is a human definition...I'm sure the universe thinks it's quite ordered, thank-you very much.
@@RtB68I’ve heard it described as energy becoming more spread out, like through friction or low energy heat radiation :0
I live close to that park, one of the purest airs i ever breathe for sure.
Sweet! I love everything about the universe, so beautiful. :)
And Brian Cox, you're a legend ;)
I really like your videos, they are great and simple.
I only pick the ones where you are casual.
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.......
"glacialy slow" is the new description I will be using for my workmates.
I was just thinking about that!
Add to bucket list: see glacier.
Love the BBC - thanks for posting this.
Big Brian Cox
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!!
Beautifully poetic in a way isn't it?
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!
Amazing photography
“1000km that way is the Antarctic and today it feels like June in Wythenshawe”
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.
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
Simple, yet very profound
So true.
Reminds me 2011, early teenage years.
that's my favorite science series for sure
I think I would enjoy him telling me off lol , Could listen to him all day..
Things can only get better ✨
,,,,,,,,,,,,,,,....... . . . Always watching here ! ......from land o' lakes,wi........DooooooooooD ! .....the best!
Brian Cox is living up to the legacy of public science teacher of the great Carl Sagan I think.
Entropy prevents water from jumping back up and reforming into the glacier. Things always move towards a lower energy state.
This separation between Past, Present and Future is only an illusion - Albert Einstein
Only a stubbornly persistent illusion* is the correct, full quote.
The present is the most phenomenal illusion.
"It's just the present we're in that's always changing that seems to make time appear'
As far as I'm concerned, no other man should be allowed to talk about science and the universe. Only Professor Cox.
everyone in awe at this guy - the way he talks and makes amazing videos - oooh aaah - unfortunately they fail to see - he's wrong
amazing is the word!!!
Things can only get better 💓
Things can get only worse. Thats what he is saying
This didn't age well my friend xd
Iv got a Question.....? But in a Multyverse Could there be not only the posabilty but the Probability of A universe running Backwards ✨.?....?
wow, those are deep thoughts! appreciate it!
I ADORE READING
I remember once seeing a documentary where an arrow in flight was used to illustrate the forward movement of time. Any responses ?
Change is permanent and irreversible. How true and universal!
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 ?
Amazing Glacier.
After Sir David Attenborough Brian Cox defo has the best narration voice.
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"
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.
2:44 Hell yeah!
Fascinating my name is Bobby Johnson
"The Vulcan Directorate has determined that there's no such thing as time travel " Sub-Cdr. T'Pol
4:20 is where he actually starts talking about it. Brian really knows how to waffle.
EDIT: oh wait a minute, he doesn't actually explain anything at all, he just says we can only travel forwards in time without explaining why. WELL THANKS A LOT FOR THAT BRI, YOU REALLY HELPED ME OUT WITH THAT ONE.
It’s called storytelling and thinking critically for yourself.
It’s a science / entertainment programme for prime time BBC.. it’s not in depth lecturing. It’s a layman’s explanation of difficult to grasp concepts, delivered in an easy accessible way. Which Brian is great at. Same with Attenborough - he’s not going into DNA sequencing on Planet Earth
Though Perito Moreno is an Argentine glaciar, Northen and Southern ice fields are Chilean
very nice my friend I like it
3:47 This confused me a bit. Sure, there's no law in physics saying "water molecules can't move away from the centre of the Earth" but they can't just spontaneously do that because they'd be moving from a low energy state to a high energy state; it would require a source of energy to make that happen. I know that's kind of his point but it's just a weird way of expressing it. He makes it sound like "ice doesn't fly because entropy"... well no, ice doesn't fly because gravity.
Well you can't really put the ice back into the position it was in before. I think he meant that also, not just to "make ice fly" but to actually undo it
Do you have the science channel?
Superb...
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?
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.
@@patmercado8145 the (typically) desert scene eh?
@@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 😅
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
I'm in love with this person 💞😍😍
I used to travel in time, but then I took an arrow to the knee
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?
4:27 is where idea of Tenet was born!
4:22 Nolan's behind the camera cameo.
This guy is today's Sagan
Production quality of British documentaries is much better than of American ones.
@callumdoyle2 Not just you, everybody is. They're the global standard of quality
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.
Attenborough vs Cox? Discuss
(IMHO Attenborough still rules, but I appreciate the efforts of others like Cox to approximate the combination of great footage, simple explanations of complex dynamics, and emotive music to capture 'drama' in the natural world)
I completely agree with your opinion, he feels like everyone's wise grandfather. Yet if I am to take an unbiased stand, I would have to say IMHO, one cannot compare the 2. Both are wonderful minds teaching us of our incredibly beautiful and intricate, yet mysterious and dangerous world. This type of knowledge and passion cannot be compared, only needed in this day and age.
He should be Knighted.
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.
what is a glassier?
got a link?
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.
What language is he speaking? (Strong accent)
whats PBS?
@Graham6762 Frontline and Nova. What are you talking about?
Me watching these 5 minutes videos ive become cleverer than my teacher
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?
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.
Maybe I would watch more TV if we had BBC in HD not just BBC America.... I know, it can take the place of the OWN network. At least they show some material on the Science channel and discovery channel!
@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.
We might be moving backward in time. For us we think we are moving forward in time, maybe the clock of the universe might be going backwards, how do we know it?
@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 :)
Not bad, but the presenter never explained what the arrow of time [there are three of them - thermodynamic, psychological, and cosmological] meant. There's a chapter in Hawking's book "A Brief History of Time" that explains it well. Essentially, things move from an ordered state to a disordered state - AKA entropy.
Why is it blue?
Awesome
The science in this video is also glacially slow. David Attenborough would definitely appreciate this though. I think entropy is the name of the game here. Much as I admire Brian Cox, a concept of 'time's arrow' is misleading and metaphysical at best.
change is the only constant in the universe...
sadly we and things around us must adapt or perish....
There are multiple physics constants...
Neat vid!
I am an artist trying to promote my theory on the dynamics of light and time.
This theory is based on two postulates
1. Is that the quantum wave particle function Ψ represents the forward passage of time ∆E ∆t ≥ h/2π itself
2. Is that Heisenberg’s Uncertainty Principle ∆×∆p×≥h/4π that is formed by the w- function is the same uncertainty we have with any future event.
This process of continuous change we see and feel as the flow of time itself!
@VerucaBucket
Maybe DireTheDecadent is the Host's RUclips username, and your comment about James Blunt really got to him... it would to me!
The big bang is still happening.
He kinda look like the Australian stand up comedian James Smith :)