4 ms·
It's weird to me too. But articles says it's because the brain alternates activity in hemispheres. It switches activity to each hemisphere, possibly as it gets
by strict9 8y ago
It's weird to me too. But articles says it's because the brain alternates activity in hemispheres. It switches activity to each hemisphere, possibly as it gets too cool.
>These marine mammals have evolved a half-brain style of sleeping, perhaps as a way to remain alert enough to avoid predators and drowning.
>Because part of the brain is always active, it’s always warm. As a result, it never triggers R.E.M. sleep.
- John_KZ 8y agoIt's weird they don't mention the much more obvious fact that an air-breathing mammal might need to maintain some level of alertness when sleeping in water.
- djmips 8y agoFrom the article: "These marine mammals have evolved a half-brain style of sleeping, perhaps as a way to remain alert enough to avoid predators and drowning."