He thought the universe was eternal until math found time’s beginning #documentary #shorts

Ajouté : 2026-05-07

[00:00:00]black holes extremely massive but compressed down into an unimaginably small amount of [music] space. These things are warping space and time in ways that you can't even imagine. It's causing space around that matter to curve so tightly that even light can't get out. But then Hawkings thinking about the history and origin of the universe itself. He realizes that if the universe is expanding outward in the forward direction of time then matter is getting more and more spread out and he starts thinking about well what happens in the reverse direction of time. If the matter is more diffuse in the forward direction of time it means it's more concentrated in the reverse direction of time. Then according to Einstein's theory of general relativity the space around matter should get more tightly curved. So as you go back in time, as matter gets more densely [music] concentrated, the space gets more tightly curved and you eventually get to a limiting point where the matter gets so densely [music] concentrated that the space gets so tightly curved that eventually you can't go back any further. And this Hawking calls the singularity a point of infinite density and infinitely tight curvature.