the.com/arrow of time
Entropy's one-way street: you can scramble an egg, never unscramble it.
means The observed fact that time seems to move in only one direction, from past to future, tracked by the universe's steady slide from order into disorder.
from Coined in the early 20th century by the astrophysicist Arthur Eddington, who pictured time as a directional arrow to describe how thermodynamics — specifically the relentless rise of entropy described by the second law — gives time its forward-only direction, unlike the symmetric dimensions of space.
- root cause
- low-entropy big bang, not physics laws themselves
- symmetry oddity
- most equations work fine running backward
- memory clue
- you remember past, not future, because entropy
- black holes
- entropy's ultimate hoarders, never give it back