Orangutans make up for lost sleep with daytime naps, study finds

Orangutans make up for lost sleep with daytime naps, study finds

When it comes to sleeping, few animals are as fastidious as orangutans. Each evening, as twilight approaches, the tree-dwelling great apes meticulously weave a cup-shaped nest out of branches, twigs and leaves, line it with comfortable soft foliage, and bed down for the night. The nest secures them high in the forest canopy and allows them to grab up to 12 or 13 hours of shut-eye per night. For more than a decade, researchers studying a group of…