National Geographic Tales of the Weird by David Braun
Author:David Braun [Braun, David]
Language: eng
Format: epub
ISBN: 978-1-4262-0966-6
Publisher: National Geographic Society
Published: 2012-10-22T16:00:00+00:00
All-Nighters
Birds are known to handle sleep deprivation better than any other mammal. For example, pigeons can survive for months with only about 10 percent of their normal sleep time. One hypothesis for migrating birds’ ability to sleep so little was unihemispheric sleep, where half the brain sleeps and the other half remains active. Dolphins and fur seals are unihemispheric sleepers—they swim and breathe while literally half asleep. However, after preliminary experiments on Swainson’s thrushes, scientists found that unihemispheric sleep was probably not the primary way the birds handled sleep loss. The most intriguing observation was that the thrushes were less active and took more naps during migration season.
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