Mystery of how early animals survived ice age

Source: Science Daily

How did life survive the most severe ice age? A team has found the first direct evidence that glacial meltwater provided a crucial lifeline to eukaryotes during Snowball Earth, when the oceans were cut off from life-giving oxygen, answering a question puzzling scientists for years.

https://www.sciencedaily.com/releases/2019/12/191202190423.htm