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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

    Time flies like an arrow; fruit flies like a banana.

    · 50

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  • Gryphon Gaming

    We all have a choice of religion.

    · 14

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    in reply to dhaval1489 (Show the comment)

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  • littleconnor1

    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

    you can even say "thank you don't need one"

    ·

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    in reply to Gryphon Gaming (Show the comment)
  • nickharvey7

    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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    in playlist Mainstream Physics videos linked to alternative physics
  • weterman4320

    That's my belief. God is a computer nerd that made us!

    · 3

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    in reply to dhaval1489 (Show the comment)
  • Stephen Goralski

    Because God. 

    ·

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  • MoorePhysics

    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

    How can you know?

    ·

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    in reply to Madison Tubbe (Show the comment)
  • gsalto95

    the bible is not a historical book. do not take everything you read there literally

    ·

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    in reply to FunFunnies (Show the comment)
  • Cyrus Levy

    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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    in reply to James Regli (Show the comment)
  • Cyrus Levy

    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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    in reply to Anu Saukko (Show the comment)
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