00:00like water and air all creatures that live on earth also need sleep and experts still aren't
00:08entirely sure why especially considering that sleep habits of certain species vary wildly
00:12alluding to evolutionary adaptations take large hairy armadillos for instance a creature that
00:18spends 20 hours a day sleeping otters sleep floating on their backs in rivers lakes and oceans
00:23oftentimes holding hands as they snooze in their natural water beds bats on the other hand sleep
00:28upside down clinging to the ceilings of caves and trees however some bats like the walberg's
00:33epauletted fruit bat practice what's called unihemispheric sleep keeping one eye and half
00:38their brains awake while horses might sit down in the pasture for brief periods to rest and grab some
00:43REM sleep most of theirs is spent standing they possess a special tendon locking system that allows
00:48them to do this and gives them the ability to escape predators in the blink of an eye if need be
00:54similarly great frigate birds can sleep while flying often in short 10-second bursts they sleep
00:59more on land and use unihemispheric sleep like those bats to avoid mid-air collisions
01:04times
01:16you
01:19you
01:24you
01:28you
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