The Story Of Snowball Earth
Drawing on evidence across multiple continents, scientists say these Snowball Earth events may have paved the way for the Cambrian explosion of life that followed — the period when complex, multicellular organisms began to diversify and spread across the planet. When Caltech geologist Joe Kirschvink coined the term Snowball Earth in 1989 — merging ideas that some geologists, climate physicists and planetary chemists had been thinking about for decades — many earth scientists were skeptical that these cataclysmic events could really have occurred. For a long time we had a lot of evidence for glaciation at low latitude and in the warmest parts of the Earth, but we didn’t really have a good idea of the dates of these events.
Source: www.knowablemagazine.org