We're all familiar with the idea of a sleep cycle. For people, sticking to a schedule helps our internal clock stay accurate, letting us sleep when it's time for bed, eat at mealtime and stay awake ...

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All animals have an internal clock called a circadian clock, which is regulated by cues from their environment — but animals in zoos can be exposed to very different cues from animals in the wild.

Pandas, with their adorable faces and signature black-and-white coats, seem like they belong in the world of children’s ...

Hong Kong (CNN) — Pandas famously love bamboo but the fluffy mammals actually have digestive systems typical of animals that eat a meat-based diet – and Chinese scientists now think they know why.

(CNN) — Giant pandas living in captivity could be suffering from “jet lag” if their body clocks don’t match their environments, scientists say. This could have a significant impact on the well-being ...

(CNN) — Giant pandas living in captivity could be suffering from “jet lag” if their body clocks don’t match their environments, scientists say. CNN — (CNN) — Giant pandas living in captivity could be ...