For decades, scientists have proposed that the planet may once have been a "Snowball Earth," and new research suggests oceans could have churned underneath an ice-covered Earth, potentially helping to provide life with vital nutrients.
Earth was a frozen Snowball when animals first evolved
Around million years ago, much of the Earth's surface was covered in ice during a glaciation that lasted millions of years. Explosive underwater volcanoes were a major feature of this 'Snowball Earth,' according to new research.
By the latest Proterozoic, some 560 million years ago, glaciers had three times covered the Earth perhaps even to its equator, creating what some have called “"snowball Earth.”“ The continents that came to dominate the next era – the Paleozoic – were alre