WTF Fun Fact – Birds Unihemispheric Sleep

Birds have the ability (unihemispheric) to let half their brain sleep while the other half is awake. Researchers found when ducks sleep in a row, those on either end sleep with one eye open to look for predators. – WTF Fun Facts

Source: Half-Brained Ducks in a Row | Science | AAAS (sciencemag.org)