Deep in the frozen reaches of the planet, scientists have uncovered evidence of a catastrophic event that once encased the entire world in ice. This gripping documentary explores the radical theory of a Snowball Earth, a period in our planet's history where temperatures plummeted and glaciers covered the globe from pole to pole. Through the eyes of researchers, we follow the trail of geological clues that suggest this extreme climate shift may have occurred multiple times, fundamentally altering the course of life on Earth and potentially triggering the evolution of complex organisms.