Scientists have always thought that archosauromorpha, an animal group that includes crocodiles, birds and dinosaurs, reproduced only by laying eggs. But now, paleontologists have uncovered a 250-million-year-old fossil of a strange long-necked marine reptile with an embryo inside, demonstrating live birth in archosauromorphs for the first time and forcing a rethink of reproductive evolution.
Continue Reading Pregnant fossil reveals major reptile group didn’t just count on eggs
- University of Bristol
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