New evidence found in the Rocky Mountains of Colorado supports the notion that Snowball Earth was indeed a global phenomenon.

'Snowball Earth:' Entire planet was likely covered in ice more than 600 million years ago

Source: space
Source Link: https://www.space.com/the-universe/earth/snowball-earth-entire-planet-was-likely-covered-in-ice-more-than-600-million-years-ago