The art of nodding off appears to have been mastered by breeding chinstrap penguins, who take more than 10,000 naps a day, with each nap lasting an average of four seconds, according to a new study.

Constantly on the nod, chinstrap penguins catch seconds-long bursts of sleep 10,000 times per day So named because of the narrow band on their heads, these penguins catch slumber every second they can ...

Penguin colonies in some parts of the Antarctic have declined by more than 75% over the past half century, largely as a result of climate change, researchers say.

These nesting penguins nod off over 10,000 times a day, for seconds at a time. Micronaps net chinstrap penguins over 11 hours of sleep a day and let them watch for predators ...

While flying, frigatebirds can sleep one half of their brain at a time, and northern elephant seals can nap for 10 or 15 minutes at a time during deep dives, for example.But chinstrap penguin ...