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Salt may have pushed us further into Snowball Earth 700 million years ago
- March 6, 2026 at 9:00 PM
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Our planet plunged into one of the most dramatic climate states in its long history, approximately 720–635 million years ago. During a period geologists call Snowball Earth, ice sheets crept from the poles all the way to the tropics, covering the oceans and continents in a nearly global freeze.
Originally published at Phys.org