Scientists at the University of Southampton have uncovered evidence from ancient rocks that Earth's climate continued to fluctuate during its most extreme ice age—known as Snowball Earth. During the Cryogenian Period, between 720 and 635 million years ago, it has long been believed that Earth's climate entirely shut down.

Scientists at the University of Southampton have uncovered evidence from ancient rocks that Earth’s climate continued to fluctuate during its most extreme ice age—known as Snowball Earth. During the Cryogenian Period, between 720 and 635 million years ago, it has long been believed that Earth’s climate entirely shut down.

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