Crocodiles are among the most resilient and deadly creatures on Earth, with a lineage stretching back over 200 million years. Often called "living fossils," they’ve survived mass extinctions, climate ...

Initial studies of the crocodile immune system in 1998 found that several proteins (antibodies) in the reptile’s blood killed bacteria that were resistant to penicillin, such as Staphylococcus ...

Sauropods had blood vessels clusters in their giant nostrils and mouths, suggesting they used panting to stay cool. And fierce, large theropods like T. rex and Allosaurus may have used their sinuses.