Why sleep? -- 1. Exteme burnout -- 2. Enemies of sleep -- 3. Cycling through the night -- 4. Tick tock body clock -- 5. Croc dreams and sloth slumbers -- 6. Mysterious dreams -- 7. What is a dream? -- 8. Now you're the expert.
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The 25th It's True! title goes under the duvet to investigate sleep - why we need it, how much we should have, what happens under extreme sleep deprivation, whether animals dream, what dreams mean.