
We Know More About Time Than You Think
WIRED · 18:23
Brian Greene walks through humanity's evolving understanding of time — from Newton's absolute clock through Einstein's relativity (time dilation from motion and gravity, confirmed by atomic clock experiments) to the entropy puzzle. He explains why the second law of thermodynamics alone can't explain the arrow of time (entropy should increase in both temporal directions), and why physicists must hypothesize an extremely low-entropy Big Bang to anchor time's direction — a condition no one can yet explain.
Alösha's take: A clean 18-minute physics lecture that gets to the real unsolved problem — why was the Big Bang so ordered? Good one for the 'what is time actually' rabbit hole.










