Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing ...

Five 'mass extinctions' have decimated our planet since it was formed - now scientists claim the answers to two could be ...

J urassic Triasic Permian Penrsylvanian Mis,ippian Devonian Silurian Ordovician Cambrian ... Age of fishes Rise of invertebrates Dominance of trilobites Oldest known fossils Primitive marine ...

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Bottom-dwelling trilobites were among the many victims. Nicknamed “The Great Dying,” this was the deadliest of all. It wiped out most marine and land species—and nearly all insects.

The researchers also studied fossils of extinct fishes dating back almost 400 million years and saw evidence that some of the ...