Cats are famous for their ability to nap anywhere and everywhere, but horses have a cool naptime trick too. They can get some shut-eye while standing up! (Why couldn’t humans have inherited this ...

If you've ever passed by a field of horses at night, you've probably noticed that they rarely lie down to sleep. So why do these mammals sleep standing up? The answer is one of survival: Horses ...

When your baby finally falls asleep in your arms, lying down should feel like a moment of relief. But many parents notice that the moment they recline, the baby wakes up, sometimes instantly. This can ...