Imagine Earth totally frozen over—oceans, lakes, even the tropics! Scientists now think massive volcanic eruptions 720 million years ago, plus a chilly climate and zero plants, set off this wild 'Snowball Earth' era. The fresh volcanic rock soaked up so much CO2 that it triggered a global deep freeze. Turns out, timing is everything—similar eruptions at warmer times didn’t have the same icy effect! #Science #ScienceFacts #EarthHistory