Our planet’s history includes episodes of cold so extreme that glaciers reached sea level in equatorial regions. Source: https://earthsky.org/earth/whats-coldest-earth-has-ever-been…
Tag: Snowball Earth
A Plunge In Incoming Sunlight May Have Triggered ‘Snowball Earths’
Jennifer Chu writes via Phys.Org: At least twice in Earth’s history, nearly the entire planet was encased in a sheet of snow and ice. These dramatic “Snowball Earth” events occurred in quick succession, somewhere around 700 million years ago, and evidence suggests that the consecutive global ice ages set the stage for the subsequent explosion of complex, multicellular life on Earth….
This Australian meteor crater is oldest known, says study
“We found the world’s oldest asteroid strike in Western Australia. It might have triggered a global thaw.” Source: https://earthsky.org/earth/australian-yarrabubba-meteor-crater-oldest-known…