Laura Poppick
Glaciers May Have Covered the Entire Planet—Twice
This story was originally published by Knowable Magazine. Nautilus Members enjoy an ad-free experience. Log in or Join now . The Earth has endured many changes in its 4.5-billion-year history, with some tumultuous twists and turns along the way. One especially dramatic episode appears to have come between 700 million and 600 million years ago, when […]