The Arrow of Time feat. Sean Carroll

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. Trying out a new feature: English Transcript! Let me know how it works Tweet it - http://bit.ly/vJRWOo Facebook it - http://on.fb.me/tHwjDU mi

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