The naps last for only around 4 seconds at a time, researchers said Chinstrap ... to study the penguins, scientists inserted devices into a small group of the animals' skulls.

Winston Churchill famously napped, and companies like Zappos encourage employees to doze on the job to improve their ...

Researchers have unveiled that chinstrap penguins slumber for more than 11 hours per day. However, there exists an astonishing secret behind this feline-like behavior: they accumulate their sleep ...