By Thalia Kalkipsakis
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Extra resources for It's True! Sleep Makes You Smarter
Sample text
Do you know that song? Believe it or not, Paul McCartney dreamed the tune to ‘Yesterday’. He describes tumbling out of bed and playing the tune: ‘It was all just there, a complete thing. 55 REAL-LIFE SLEEPING BEAUTY In August 1941, when Elaine Esposito was six, she was put under an anaesthetic for an operation. She never woke up. Elaine stayed in a coma until she died in 1978 – an amazing 37 years and 111 days later. During that time she slept some of the time, and was unconscious the rest of the time.
What about birds? Baby birds do dream, just after they have hatched. Adult birds hardly dream at all! Their dreams are only a few seconds long, and are the only time when they sleep and close both eyes. The rest of their time asleep, they keep one eye open for danger. Lion lunch? If you thought a lion wanted to eat you, you’d probably run away. Or maybe you would hide. You definitely wouldn’t lie down and go to sleep, would you? If you did sleep, then you wouldn’t have much chance of waking up again.
Others would go dang every 90 minutes or so (at the end of a sleep cycle). One or two would go off once in a lifetime. When you reach puberty (dingdingdingding), hormones are released that start off all the growing and changes. Some scientists now believe that puberty also re-sets your sleep-wake body clock. There seems to be a delay in melatonin release at night during puberty. Since melatonin makes you feel sleepy, a delay in melatonin release will make your natural bedtime slightly later. Maybe that’s why you (or your big brother or sister) are up till all hours .