Geologists find solid evidence of ancient ‘snowball Earth’
Our planet used to be a snowball. Roughly 635 and 720 million years ago, Earth was completely covered in thick ice. While somewhat barren at the time, this period eventually…
Our planet used to be a snowball. Roughly 635 and 720 million years ago, Earth was completely covered in thick ice. While somewhat barren at the time, this period eventually…