Mysterious ichthyosaur graveyard may have been a breeding ground

In a fossil graveyard in Nevada, palæontologists have found more than 100 individual Shonisaurus popularis ichthyosaurs — including both adults and embryonic or newborn individuals, but no juveniles. The finding supports the theory that the prehistoric marine reptile migrated to sheltered waters and gathered in groups to give birth, as some whales do today.