The Snowball Earth hypothesis suggests that during the late-Precambrian, ice completely covered all of the continents, and the world's oceans froze over.

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The Snowball Earth hypothesis posits that during the late-Precambrian, the entire planet was covered in ice, including the continents and oceans, which is often referred to as a "snowball" state.

The Snowball Earth Hypothesis Suggests That During the Late-Precambrian, Ice