News Main Animals Archaeology Dinosaurs Earth History Human Animal Space Tech   Lunar and Planetary Institute |   Killed by Deadly Oceans? In the three to four million years before the Permian-Triassic extinction, illustrated here, the seas were already oxygen-starved, according to a new study. The stagnant depths were a haven for bacteria that belched poison that crippled life on Earth, leaving it vulnerable to the volcanic knockout punch that would soon come. | Discovery News Video   « back to article

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