Scientists have discovered a new species of chiton, an ancient marine mollusk that has remained virtually unchanged for the ...

Mollusks appeared 540 million years ago, but almost half the unique traits of this group evolved in the first 96 million years. Since then, the rate of evolutionary innovation has slowed and become ...

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Scientists in South Korea identified Acanthochitona feroxa, a new chiton species long mistaken for a nearly identical mollusk.