Our planet is unique for its ability to sustain abundant life. From studies of the rock record, scientists believe life had already emerged on Earth at least 3.5 billion years ago and probably much ...
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Scientists record coldest ocean temperature ever in Earth's history—and wonder how life survived
About 700 million years ago, Earth was entombed in a veneer of ice hundreds of feet thick—a frozen state scientists refer to ...
New research shows ancient tropical oceans once held more oxygen than cooler regions, reshaping where early life could survive and evolve.
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