TIM: Miss a couple nights in a row, and you'll actually start to see things. If you miss one night of sleep, you'll probably feel cranky and a little uncoordinated.Īn image shows a sleep-deprived Tim looking cranky and weary. TIM: Whatever's going on in there is important. Brain scientists called neurologists are still hard at work to figure out what happens in the brain during sleep.Īn image shows a neurologist monitoring a boy's brain activity while he sleeps. TIM: Regardless of who's doing it, sleep is sort of a trancelike state, where you're less aware of your surroundings than you are while awake. It's sitting in a curled position with its head twisted around and resting on its back. We humans like to lie down, but some animals can sleep in pretty funny positions!Īn image shows a sleeping giraffe. TIM: Most animals that do sleep close their eyes and get into some sort of resting posture. TIM: But mostly, animals just sleep for a certain period each day. Side by side animations show hibernating animals. Some animals go into a seasonal deep sleep called hibernation. TIM: Yeah, all mammals and birds sleep, but how much sleep they get depends on the animal. TIM: It's time to rest for your body, but your brain is another story! No one is entirely sure what our brains are up to during sleep, but while our conscious mind may shut down, our nerve cells are still hard at work.Īn animation shows the brain inside the figure’s head. Your body temperature drops and your blood pressure decreases. During sleep, your breathing slows down and your muscles relax. After a full day of working and playing, your body needs to take a break. TIM: Dear Tim and Moby, Why do we need to sleep? From Centre50m. Moby lowers his head to Tim's bed and waves the letter at him. Moby is holding a letter in the upper bunk. Tim is sleeping and snoring on the lower bunk bed. Text reads: The Mysteries of Life with Tim and Moby
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