A glimpse back at 'snowball Earth': Rock formation spanning Ireland and Scotland may be the world's most complete record of a global freeze 700 million years ago
4 months ago
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It's easy to forget today, but Earth wasn't always a lush blue world. 700 million years ago it was a shimmering 'snowball', an ice planet worthy of Star Wars.
A glimpse back at 'snowball Earth': Rock formation spanning Ireland and Scotland may be the world's most complete record of a global freeze 700 million years ago