[00:04] down the sun's heat makes it 75% dimmer. That's because hot objects lose their power much faster than temperature. As it cools, the sun emits fewer photons. These have longer wavelengths [music] and less energy, turning our sun orangey
[00:18] red. The drop in solar power would be the least of our worries. Plants usually feed on red and blue light, but this visible light gets weaker and the now dominant infrared light tends to bounce [music] off. Vegetation as we know it
[00:31] ceases to exist with severe consequences for everything from insects to crops. We could probably survive for a year or two before stock piles ran out, but we'd freeze [music] long before that. Within a week, temperatures on the surface drop
[00:45] by around 10°, but the oceans hold on to some stored heat. But after a year, the average temperature [music] falls well below zero. Ice spreads from the poles every mountain range [music] as the entire ocean surface freezes over. And
[01:01] as ice and snow reflect more sunlight back into space [music] than soil, it gets even colder. Geothermal areas like Iceland with 38° thermal springs are now the only safe spots on this snowball Earth. On the bright side, you'll never
[01:16] Earth. On the bright side, you'll never need another pair of shades.