@newscientist: What is the arrow of time and how does it work? ➡️🕛 In our latest video, physicist Sean Carroll discusses why electrons appear to behave like waves, how observation seems to affect reality and whether the universe constantly branches into countless parallel worlds. Carroll also explains the measurement problem, the challenges of interpreting quantum theory and why physicists still debate what quantum mechanics is actually telling us about the nature of reality. Carroll is a theoretical physicist, cosmologist and author whose work focuses on the foundations of physics, quantum mechanics, cosmology and the nature of time. Tap the link in bio to watch the full video #physics #arrowoftime #quantum
Sorry he starts with “there is an arrow of time because entropy is increasing” that’s the same as saying “there is an arrow or time because there is an arrow of time” it’s saying nothing at all.
2026-07-01 11:20:30
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Spiro Grant :
I maintain, Carroll is the best at explaining physics in understandable terms
2026-07-01 17:50:19
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wesleymadness :
The Bing Bang - Cosmology's version of The Firmament. 😂
2026-07-01 17:27:56
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gman.of.the.woods :
non sense. entropy is a just a concept
2026-07-02 02:42:44
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WPO-Netherlands :
What a nonsense! Thermodynamics dictates 1 direction of time
2026-08-12 23:35:24
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Zed :
It’s really simple. It’s direction of rotation.
2026-07-01 11:39:57
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Duckbill :
As the universe expands what is taking the space?
2026-07-25 23:20:40
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Luvpimpinyou :
time is not real
2026-08-12 05:25:19
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train.lift.truck :
Maybe we give too much credit to time or we give too much importance to it. Time is felt as a series of events that tends from point A to point B. Time has no values for the universe. The universe "started" at point A and we're heading towards point B. It's just an evolution through changes.
2026-07-01 17:52:43
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Scotty :
And at that very very very long time and entropy becomes maximum, two branes touch and “bang” all over again.
2026-07-02 01:21:40
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seagull406🇵🇹 :
Time doesn’t exist, if you stay still there is no time
2026-07-04 00:37:05
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Mura :
Arrow of time arises from wave mechanics and collapse. time and gravity are produced when wave collapses into matter.
2026-07-01 17:43:40
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Presc13nt :
Love this guy
2026-07-02 16:26:33
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Iocane Resistor :
Is he saying that in a contracting universe we would still believe ourselves to be in an expanding universe?
2026-07-01 23:38:45
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Peri Bathos :
I wasn't prepared for modern quantum mechanics to substantiate Nitchesche's eternal recurrence.
2026-07-02 00:04:55
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GG ツ :
Arthur Eddington’s Arrow of Time. Also, after the heat death of the universe black holes will still exist. They’re literally time Gods. Nothing new will be created like stars or universes, but black holes will still be here.
2026-08-22 19:00:35
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evan :
Even if you only allow for an expanding only universe, even one that is increasing in its rate of expansion, we're barely at the beginning of the life of the universe.
2026-07-04 05:01:41
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Q u i n n 🍀 :
Love this! ✨
2026-07-29 03:16:42
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RonJoe73 :
I thought all the available evidence was that the expansion of the Universe was accelerating so there will be no crunch?
2026-07-01 20:55:08
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meliii :
Singularities are phase transition points.
2026-07-02 19:43:31
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Gray eyes :
If there were crunches, wouldn’t the dispersion of elements be different? How would the crunch get us back to a quark gluon plasma to cycle through the formation of heavier elements again? I thought that the current distribution was accounted for based on the initial state. Does the crunch heat everything to the point where all atomic structure breaks down again?
2026-07-01 23:10:56
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andi_83 :
In quantum physics alone, GR excluded, does time begin with the Higgs field?
2026-07-01 20:21:59
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Dak the merciless :
How to say time is a human construct that gives perspective… that’s it
2026-07-01 11:52:16
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Barney Barn Barn :
“There is no arrow of time to reverse”. This must be true before the big bang AND after the Big Crunch. Right? Why do people have a hard time (ha) coming to terms with this. “What happened before the big bang?” Nothing. Time is space. No space no time. Nothing happened before the bang because there was no before. It’s the beginning of the tape. What I’m trying to say is “be kind rewind”.
2026-07-01 13:56:22
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illwill :
advaita vedanta need to be more popular.
2026-07-01 14:17:40
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