"Over 650 million years ago, our entire planet existed in a frozen state. So speculates the hypothesis known as Snowball Earth. The mounting evidence of this controversial phenomenon is explored in great depth in the second episode of Catastrophe series, as scientists and geologist comb the farthest reaches of the globe in search of the next clue of Earth's rich and elusive history.

​

The film begins in the Australian Outback. There, geologists have uncovered the existence of dropstones, a rock fragment that is thought to only occur in the presence of ice formations. How then are these dropstones detected in the middle of a desert wasteland?..."