New research suggests that powerful star explosions, called supernovae, may have caused at least two mass extinctions in ...
Learn about the time period that took place 416 to 359 million years ago. 4 min read When the Devonian period dawned about 416 million years ago the planet was changing its appearance. The great ...
The late Devonian and Ordovician mass extinctions remain mysteries. The Ordovician event is believed to have wiped out about 60% of invertebrate sea creatures when most life was in the ocean.
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