One of Earth’s biggest mass extinctions caused by rising sea levels in eerie echo of today

The Devonian period is also known as the Age of Fishes. Here, we see the fish Dunkleosteus preying on eurypterids (sea scorpions), which in turn were feeding on the smaller trilobites.  (Image credit: Aunt_Spray via Getty Images) Depleting oxygen and rising hydrogen sulfide levels in the oceans may have been responsible for one of Earth’s […]

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