Earth
Worst mass extinctions may have been caused by rising mountains
A pair of mass extinctions struck in quick succession just before the dinosaur era, and the birth of a mountain range in South Africa may have been partly to blame
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A pair of mass extinctions struck in quick succession just before the dinosaur era, and the birth of a mountain range in South Africa may have been partly to blame
Microscopic fossil burrows found in ancient rocks reveal that small worm-like animals existed more than half a billion years ago