When it comes to babies, they need their sleep. These tiny ones just entered the world, and it can be overwhelming for their little selves. As much as they may love falling asleep anywhere they lay ...

Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep.

Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep. Sleep is universal “even though it’s actually very ...