Chinstrap penguins take thousands of 4-second naps a day so they can stay alert and guard their newborns around-the-clock, researchers say

Chinstrap penguins take thousands of 4-second naps a day so they can stay alert and guard their newborns around-the-clock, researchers say

Wild chinstrap penguins on King George Island, Antarctica.Won Young Lee/AP Photo <ul> <li>Chinstrap penguins take catnaps instead sleeping for a long period of time, researchers found.</li> <li>They… [+3791 chars]

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