
Glaciers ‘bulldozed’ snowball Earth and changed ocean chemistry, paving the way for complex life, scientists say
By Mindy Weisberger, CNN (CNN) — More than half a billion years ago on a frigid, ice-covered Earth, glaciers stirred up ingredients for complex life by bulldozing land minerals and then depositing them in the ocean, according to a new study. Inch by inch, as massive glaciers crept over frozen land toward an ice-covered sea,
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