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Dino-era delivery at sea

Genetic determination of gender is linked to live birth and evolutionary success of ancient marine reptiles

By Sid Perkins

- More than 2 years ago

Reptiles that took to the seas during the Age of Dinosaurs succeeded evolutionarily in large part because their ancestors determined the gender of their offspring by genetics rather than by incubation temperature.

BORN AT SEA Mosasaurs, one of the three groups of marine reptiles to thrive during the Age of Dinosaurs, gave birth at sea.