Snowball Earth
c. 720 million years ago · Event
On the Snowball Earth hypothesis, runaway glaciation freezes the planet nearly to the equator; its thaw precedes the rise of complex life.
On these timelines: Master
c. 720 million years ago · Event
On the Snowball Earth hypothesis, runaway glaciation freezes the planet nearly to the equator; its thaw precedes the rise of complex life.
On these timelines: Master