Bivalves

Spondylus americanus and Arctica islandica

Why there are so many species at the equator—and so few at the poles

3-D models of bivalves

3-D imaging, AI reveal stories hidden in shells

Halfwashed grab of sealife

Alaskan seashells reveal a changing Arctic

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Scientists predict extinction risk for hard-to-track species

Model predicts number of species yet to be discovered, regionally

Evolutionary study shows bridge species drive tropical engine of biodiversity