Leonard Susskind Explains the Arrow of Time

Santa Fe Institute · Lecture · 1 h 14 min · 2013 · YouTube title: Why is Time a One-Way Street?

Why it's here

HN commenters recommend it as a clear explanation of why time runs one way, from a leading physicist.

What it covers

Leonard Susskind's Santa Fe Institute talk on the arrow of time: why the past differs from the future when physics equations are time-symmetric. He covers entropy, cosmology and Boltzmann brains.