302 | Chris Kempes on the Biophysics of Evolution

4284.787 - 4308.815 Chris Kempes

And so Snowball Earth was this phase of Earth history where the Earth was mostly covered in snow and ice, including the oceans. So the glaciers come, even the ocean glaciers, sea ice, come all the way down to the equator. And then people debate about whether this is a hard snowball or a soft snowball with some amount of open equator and some amount of open patches of water around the planet.