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Why Doesn't Time Go Backwards?

Why Doesn't Time Go Backwards?

Could we have lived in a universe where time went backwards? Why do things get older rather than younger? Explore this conundrum in the video below.

Why Doesn't Time Go Backwards?

Hint: it has to do with entropy.


What Is Entropy?

Clarify one of the most puzzling ideas in science.

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Key Facts In This Video

  1. In 1865, Rudolph Clausius coined the term "entropy" and wrote the first modern form of the second law of thermodynamics. 00:50

  2. Entropy is an emergent property—a property that arises when the whole is more than the sum of its parts. 02:05

  3. A classic definition of entropy states that it is a measure of the "disorder" of the energy of a collection of particles. 03:06

The Big Bang Theory

Hear about how our universe began.

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