Some animals appear lazy at first glance, spending large portions of the day asleep or resting. In reality, frequent naps ...

Sleepwalking is commonly known as a human phenomenon, but have you ever imagined your cat, dog, or even a turtle roaming around in their sleep? This bizarre behavior, known as somnambulism, is seldom ...

Sleep is important for everyone, but some animals take it to a whole new level. While humans usually need around seven to ...

Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during migrations and dozing while diving.

Turns out jellyfish and sea anemones – among the ancient creatures with a nervous system instead of a brain – have a very similar sleeping routine to our own. A new study published in Nature ...

Sleep is a universal biological state that allows all animals, from mammals to amphibians, fish and even insects, to restore ...

Sleep looks peaceful on the outside, but inside the brain, it is anything but ...

Sleep is one of life’s most universal behaviors. Despite its ubiquity, it’s also one of the most mysterious. Humans spend ...