It’s common to see someone yawn — even on TV — and yawn in response. But how does that happen, and why is yawning contagious?
How much do animals sleep? From bats to giraffes, here are the typical sleep needs for more than 30 different creatures — including humans.
Why do people have trouble remembering their dreams? And more to the point: is there anything you can do to improve your dream recall? Get some tips here!
Always tired… tired of insomnia? Here are a few things you can try that might help you get to sleep, and to stay in dreamland all night.
The study of yawning is anything but boring. It boasts a rich history of theories that go back to antiquity. So why do we yawn?