update, and correcting my correction
Here's a better write-up of the snowball earth article:
https://www.sciencedaily.com/releases/2020/05/200507130704.htm
Also, hank, I can see why including the Edicarian in a term like "Precambrian Explosion" is sort of technically correct. It bothers me though. Is it because I learned it as Cambrian Explosion, or that I don't think the life in the Edicarian was as big an acceleration as the Cambrian, or that maybe the boundary for the Phanerozoic/Precambrian should be moved to reflect our growing knowledge, otherwise Neoproterozic Explosion is too much of a mouthful? Not sure. But I do know I was being pedantic. Sorry 'bout that.