Earth

Snowball

Earth’s terrifying journey into the deep freeze starts with fire, not ice. 800 million years ago, long before the age of the dinosaurs, before there was even animal life, the giant supercontinent Rodinia breaks up. Earth’s vast powerful tectonic forces rip the land apart, kicking off a series of events that results in huge amounts of carbon dioxide being sucked from the atmosphere and sending global temperatures plummeting.