This is a great question, James, but will require more thorough reading than a summarised version here.

Snowball Earth refers to a theory that the Earth was almost entirely or wholly covered in ice, for millions of years.

This freezing happened over 650 million years ago in the Pre-Cambrian period, but it's now thought this wasn't the only time the Earth had frozen over; it may have happene... more

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Michael Wiggins
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null students helped

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2 years ago


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