TIME the Science of Sleep by TIME Magazine

Author:TIME Magazine [The Editors of TIME]
Language: eng
Format: epub
Publisher: TI Inc. Books
Published: 2020-04-15T20:30:00+00:00

A LEG TO STAND ON Researchers in South Africa found that elephants in the wild spent most of their sleeping hours standing up. They lie down to sleep only every third or fourth night. Young elephants, pictured here in Kenya’s Amboseli National Park, rest on the ground with adults nearby.

SLUMBERING SEALS Although northern fur seals forgo most REM sleep when they are in the water for months at a time, researchers have not discovered any signs of REM-sleep deprivation.

HALF ASLEEP Dolphins cannot breathe underwater and so must be continually conscious in order to take breaths of air from the surface. But since dolphins must also rest, they have evolved the ability to power down half of their brains at a time. While half the brain rests, the other half remains conscious enough to continue breathing. While “sleeping,” a dolphin might linger motionless near the surface.

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