But even before the move, this lineage was setting size records. One ancient cousin to modern whales and hippos, called Andrewsarchus mongoliensis, ranks as the largest mammal known to have ...

Andrewsarchus is often considered one of the largest carnivorous land mammals ever discovered, but how much do we really know about this prehistoric predator? With only a single skull as evidence ...

Definition. The most inclusive clade that contains Halszkaraptor escuilliei gen. et sp. nov., but not Dromaeosaurus albertensis, Unenlagia comahuensis, Saurornithoides mongoliensis or Vultur ...