Pregnant fossil reveals lots about plesiosaurs
A recently discovered fossil of a plesiosaur (think a marine turtle crossed with a giraffe) with a fetus still inside sheds quite a bit of light on the ancient creature. The dinosaur is pretty clearly pregnant - the fetus is too large to have been swallowed, of the exact same species, and doesn’t appear to have been chewed or digested. The find does reveal that plesiosaurs laid live young and invested heavily in a few young. The authors of the finding also speculate that plesiosaurs may have lived in social groups, like pods of dolphins.