Sloths are identified by the number of long, prominent claws that they have on each front foot. There are both two-toed and three-toed sloths. All sloths are built for life in the treetops.

An illustration shows what Duonychus tsogtbaatari might have looked like. Unlike its therizinosaur brethren, the new species ...

They have stubby little tails and three sharp, curved claws that reach 3-4 inches long. Pale-throated three-toed sloths have ...

The two-toed sloths, as the name suggests, have two claws on their front limbs, while the three-toed sloths have three claws on all four limbs. The two-toed sloths are also slightly larger than their ...

Even among the strangest-looking dinosaurs, few are as odd as the newly discovered Duonychus tsogtbaatari. Unearthed in ...