Cryogenian glaciations

The Cryogenian period, occurring around 720 to 635 million years ago, is marked by severe glaciations that covered much of the Earth in ice. This era is significant for its extreme climate conditions, which may have included global ice sheets, sometimes referred to as "Snowball Earth." These massive ice ages likely influenced the planet's evolution, possibly leading to critical developments in life, such as the emergence of multicellular organisms. The Cryogenian glaciations highlight Earth's dynamic climate history and its capacity for dramatic environmental changes.