I spent another Monday NOT blogging. There was so much to do, I had to dive in and get it done! It's paraphrased right there in the Bible, Book of Isaiah verses 48:22 and 57:20-21. Makes me wonder...are there living creatures that never sleep?
As it turns out, it depends on how we define sleep. There are some creatures that can "turn off" one hemisphere of the brain for a period of rest. But some creatures need very little of what we call sleep.
Giraffes require very little sleep; they enjoy only about 30 minutes a day of deep sleep split into several separate sessions. Source See, Zac? This proves there ARE Evil Giraffes!
Whales and dolphins practice unihemispheric sleep: one side of the brain sleeps while the other side stays alert to potential predators.
On the other end of the scale are koalas, which sleep about 22 hours per day! Source Are you surprised it isn't human teenagers?
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