During periods known as Snowball Earth, between 720 and 635 million years ago, early eukaryotes — complex cellular lifeforms that eventually evolved into the diverse multicellular life we see today — could have waited things out in meltwater ponds, according to new research from MIT. An artist’s impression of a ‘Snowball Earth.’ Image credit: NASA. Snowball Earth is the colloquial term for periods of time in Earth history during...
