Can Crocodiles Sleep with One Eye Open? - Discovery News

Sleep, for animals, can be a dicey proposition. While rest and renewal are necessary, snoozing can leave a creature vulnerable to threats. Some birds and aquatic mammals have adapted the ability to keep half their brain on alert while the other half slumbers, a phenomenon known as unihemispheric sleep -- in essence, sleeping with one eye open.

A new study from researchers out of Australia's La Trobe University and Germany's Max Planck Institute for Ornithology shows that crocodiles may well be taking a page from that book.

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