Birds are aflutter with activity all day long so they certainly need to rest at night – but where do they go? Other than owls ...

Birds exhibit unihemispheric sleep, a fascinating compromise between rest and survival. One half of their brain remains alert ...

Some animals can sleep with just half their brain at a time. Understanding this phenomenon can help us learn more about human ...

Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep.