Carbon isotopes in Cretaceous teeth suggest coastal dinosaurs, crocodiles, turtles and fish supplemented diets with washed-up seaweed, the first evidence of marine subsidization in prehistory.
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New fossil analysis suggests that some dinosaurs that lived near the coast over 100 million years ago consumed and resources from the ocean. Marine algae could explain the chemical signals found in fossilized teeth.
Dinosaurs living near the coasts would have integrated resources directly from the sea into their diet. About 100 million years ago, a vast inland sea cut North America in half. Its shores were home to dinosaurs,...