Most people picture sleep as a single block of rest at night, maybe stretched a little longer on weekends. Penguins live by a different rhythm. Their idea of rest is broken into countless flickers of ...

But will the penguins even be awake at night? The aquarium assures its guests that they will be. “Don’t worry — African penguins have unusual sleeping patterns and will keep you entertained until your ...

Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during ...