For nearly 30 million years, a 2,000-pound beast known as the entelodont ruled a sweeping empire from Mongolia to what is now ...

From a passageway made by giant sloths to a slinky tunnel bridge and an 'entrance to hell' - there are some extraordinary tunnels across the globe, including one beneath 10 Downing Street ...

Its original owner is a giant ground sloth that lived during the early Holocene era, soon after the retreat of the 3,000-foot-thick Cordilleran ice sheet. Its Puget Lobe, extending from Canada to ...

Indeed, after observing the relationship between extinct giant sloths and living species ... and to one side I take in ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive animals like mastodons ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive animals like mastodons ...