New Scientist |
Sleeping less in old age may be adaptation to survive in wild
New Scientist Many dangers stalk the bushlands of Tanzania while members of the Hadza people sleep, yet no one keeps watch. There is no need because it seems that natural variation in sleep means there's rarely a moment when someone isn't alert enough to raise the ... Live-in Grandparents Helped Human Ancestors Get a Safer Night's Sleep Trouble sleeping? It might be your body's way of protecting you from nocturnal threats Variation in sleep patterns between age groups linked to evolutionary adaptation, study finds |
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