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The Arrow of Time feat. Sean Carroll
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Uploaded on Nov 13, 2011
Why is the past different from the future? Caltech physicist Sean Carroll explains how the arrow of time is not an intrinsic property of physics, but rather an emergent feature.
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Top Comments
FourOFourNotFound 1 month ago
Time flies like an arrow; fruit flies like a banana.
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Gryphon Gaming 3 weeks ago
We all have a choice of religion.
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All Comments (2,579)
littleconnor1 21 hours ago
if you were at the core of the earth or away from the manetic field then your clock or watch will stop the time that it says and stays there even without the universe at all
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mrgaiusbonus 2 days ago
you can even say "thank you don't need one"
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nickharvey7 3 days ago
Could time be an emergent property with an Arrow of Time for each individual reference frame with the future continuously coming into existence with each new photon electron coupling? The electron is the most spherical object in the universe so this can form the low entropy for the increase in entropy that we have in the Second Law of Thermodynamics.
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weterman4320 4 days ago
That's my belief. God is a computer nerd that made us!
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Stephen Goralski 5 days ago
Because God. 
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MoorePhysics 5 days ago
Sorry but this video is not correct: the fundamental laws of physics DO have a built in 'arrow' of time. Time reversal symmetry is proven to exist: CPLEAR showed it initially in the Phys. Lett. B 444 43 (1998) in Kaon oscillations followed by more recent results from Babar with B meson oscillations. Granted it is a small effect but it is there and is required if we expect CPT conservation since CP is clearly violated, T must also be violated in order to conserve CPT.
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ThornTheBranch 6 days ago
How can you know?
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gsalto95 1 week ago
the bible is not a historical book. do not take everything you read there literally
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Cyrus Levy 1 week ago
How about this:
The proposition: There is a God.
The challenge: No there isn't.
The burden of proof is ALWAYS on the proposition.
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Cyrus Levy 1 week ago
You know, explanations are kind of key in arguments. I mean, if we just went around saying "YOU'RE WRONG" to people, that doesn't really prove anything, now does it? Why don't you actually refute what he said, instead of just saying "NOPE, YOU'RE WRONG"
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