Discover the extraordinary prehistoric giants – from mega-sloths to monster sharks – that once made today’s animals look ...

Cassius was an 18-foot-long saltwater crocodile living in captivity in Marineland Crocodile Park in Australia. He died last ...

80-million-year-old fossils revealed that this dyrosaurid species began to diversify millions of years earlier than ...

Giant mosasaurs, once thought to be strictly ocean-dwelling predators, may have spent their final chapter prowling freshwater ...