Museum drawers have revealed the fossilised remains of extinct giant echidnas, some as large as dogs. These discoveries shed ...

This giant cephalopod dwarfed mosasaurs and other massive marine reptiles that lived during the time of the ...

A three-foot-long skull came from the largest known land mammal - a rhino the size of six elephants. The find indicates giant rhinos migrated south, then back north via Tibet, as the climate changed.

Sloth in prison -- The Great Basin now and then -- A zoologically impoverished world -- Dating an ass -- A stable of ground sloths -- Extinct mammals, dangerous plants, and the early peoples of the ...

For more than a century, paleontologists have been piecing together how the mysterious predator Andrewsarchus is related to other mammals, like the extinct “hell pigs” and “wolves with hooves” Based ...

Giant kangaroos that lived during the Ice Age may not have been as slow and grounded as once believed. A new study finds their leg bones and tendons were likely strong enough to support hopping, ...

Explore mammals’ surprising origins, long before the age of dinosaurs. The surprising story of mammal evolution begins long before the age of dinosaurs. Witness how some of our prehistoric mammal ...