Some animals have evolved sleep strategies so bizarre they barely resemble sleep at all, and the reasons behind them reveal ...

Some animals sleep with one brain hemisphere while the other remains alert. This adaptation allows them to stay aware of ...

Researchers in Oklahoma have discovered that floating alligators keep half their brain awake as they sleep. Karen Parker/FWC photo As if alligators weren’t intimidating enough, experts have discovered ...

Some birds possess a remarkable ability to sleep with one brain hemisphere awake. This adaptation allows them to remain vigilant for predators and fly long distances. Ducks and swifts are among the ...

It is true – crocodiles can and will sleep with an eye open, according to a new study. Australian legends said that crocodiles sleep with one eye open, but no substantial scientific evidence has been ...

Sleep in the animal kingdom is anything but ordinary. These remarkable species have evolved astonishing ways to rest while ...

Animals who don’t sleep: Discover animals who don’t sleep in a conventional way! Learn about marine mammals like dolphins and orcas that use unihemispheric sleep, plus insects, fish, and other unique ...

Owing to some horrendously long flight times, scientists have speculated that certain birds are capable of sleep during flight. A remarkable new experiment by an international team of researchers has ...