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Lieberman says the idea “natural” humans sleep eight hours is unfounded; field data from communities without electric light show typical nightly sleep of about six to seven hours, contradicting the cultural prescription of eight hours as a target.
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Фото: Amir Cohen / Reuters
The unprecedented access shows how these cases are often cracked, not through state-of-the-art technology, but by spotting tiny revealing details in images or chat forums.
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