How Volcanoes Froze the Earth (Twice)
By PBS EonsFrom boclips.com
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Over 600 million years ago, sheets of ice coated our planet on both land and sea. How did this happen? And most importantly for us, why did the planet eventually thaw again? The evidence for Snowball Earth is written on every continent today.
Tags
Explainer
Life Sciences
Biology
Physical Sciences
Geography and Earth Science
Astronomy
Advanced Secondary
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