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Does the Past Still Exist?

Sabine Hossenfelder

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Albert Einstein taught us that space and time belong together to a common entity: spacetime. This means that time becomes a dimension, similar to space, and has profound consequences for the nature of time. Most importantly it leads to what has been called the block universe, a universe in which all moments of time exist the same way together. The future, the present, and the past are the same, it is just our perception that suggests otherwise.

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0:00 Intro
00:58 Spacetime
02:09 Spacetime diagrams
03:40 Special Relativity
05:05 The Relativity of Simultaneity
10:36 The Block Universe
12:46 The if's and but's
14:50 Sponsor Message

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