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Penguins seem to have emerged as the master of the "power nap". Chinstrap Penguins, native to the Antarctic, can accumulate up to 11 hours of daily restorative sleep in bursts of around 4 seconds at a time, researchers have found.

Paul-Antoine Libourel, who is a sleep ecophysiologist at the Lyon neuroscience research center in France told Newshour's Paul Henley how he and his team carried out the research tracking the sleep of the penguins on the remote King George Island in the Antarctic.

(File photo of a chinstrap penguin on Snow Island, Antarctica. Credit: Ueslei Marcelino/Reuters)