As a father of two dawn-loving children I don’t get as much sleep as I used to, which makes me wonder sometimes why I crave it so much. A number of scientists who share my curiosity have turned to sleeping animals to find an answer. Sleep appears to be an ancient behavior, perhaps 600 million years old or older. But it may not exist “for” any one purpose. Instead, sleep can serve many functions, as animals are shaped by evolutionary tradeoffs. I’ve written an article about the evolution of sleep for tomorrow’s New York Times where you can read more. (And for those interested in some of the the gorey technical details, here’s an interesting new review in Nature that’s free.)
Related Topics
Go Further
Animals
- Behind the scenes at America’s biggest birding festivalBehind the scenes at America’s biggest birding festival
- How scientists are piecing together a sperm whale ‘alphabet’How scientists are piecing together a sperm whale ‘alphabet’
- Orangutan seen using plants to heal wound for first timeOrangutan seen using plants to heal wound for first time
- What La Palma's 'lava tubes' tell us about life on other planetsWhat La Palma's 'lava tubes' tell us about life on other planets
Environment
- The northernmost flower living at the top of the worldThe northernmost flower living at the top of the world
- This beautiful floating flower is wreaking havoc on NigeriaThis beautiful floating flower is wreaking havoc on Nigeria
- What the Aral Sea might teach us about life after disasterWhat the Aral Sea might teach us about life after disaster
- What La Palma's 'lava tubes' tell us about life on other planetsWhat La Palma's 'lava tubes' tell us about life on other planets
- How fungi form ‘fairy rings’ and inspire superstitionsHow fungi form ‘fairy rings’ and inspire superstitions
History & Culture
- This thriving society vanished into thin air. What happened?This thriving society vanished into thin air. What happened?
- These were the real rules of courtship in the ‘Bridgerton’ eraThese were the real rules of courtship in the ‘Bridgerton’ era
Science
- Is the 5-second rule true? Science finally has an answer.
- Science
- Gory Details
Is the 5-second rule true? Science finally has an answer. - E-bikes are good for the environment—but what about your health?E-bikes are good for the environment—but what about your health?
- Why trigger points cause so much pain—and how you can relieve itWhy trigger points cause so much pain—and how you can relieve it
Travel
- The best LGBTQ-friendly destinations for every travelerThe best LGBTQ-friendly destinations for every traveler
- 6 of the best active pursuits on Cape Cod and the Islands
- Paid Content
6 of the best active pursuits on Cape Cod and the Islands - The key to better mindfulness may be your public gardenThe key to better mindfulness may be your public garden