Snowball Earth Was Dotted With Puddles


About 2 decades ago, scientists coined the term “snowball Earth” to describe a period about 700 million years ago when glaciers apparently smothered the planet even at latitudes near the equator. However, new evidence from ancient rocks bolsters the notion that some of the world’s seas remained unfrozen during this global deep freeze, striking a blow against the controversial idea that the planet was completely swaddled in ice at the time.


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