There are both two-toed and three-toed sloths. All sloths are built for life in the treetops. They spend nearly all of their time aloft, hanging from branches with a powerful grip aided by their ...

Mojave fringe-toed lizards have numerous traits tailored to their sand-dwelling lifestyle. Foremost are the lizards' scaly hind toes, which resemble snowshoes and keep them from sinking as they sprint ...