While sleep is a crucial component of survival for all living organisms, some animals take the concept of sleep to an extreme level. Ranging from tree-dwelling animals to nocturnal predators, the long ...

A sloth’s curved claws are long and perfectly shaped for hanging onto tree branches. Even in sleep or after death, sloths can remain suspended from trees because their grip doesn’t rely on muscle ...

The Tulsa Zoo is home to thousands of animals, but some of the most popular residents may be harder to spot during a visit. Sloths spend much of their day hanging in trees, conserving energy and ...