Why physicists say there is no universal now

What is now? What is the present moment? These questions continue to stagger us, for nothing is so simultaneously familiar and alien than the passage of time. Nothing seems more “real” to us that the present, yet it vanishes into nothing at every attempt to capture or quantify it. In this special two-part episode of Stuff to Blow Your Mind, Robert and Joe dive into the experience, physics, philosophy and neuroscience of now.

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