Modern humans continue to be drawn to crystals, sometimes attributing healing or spiritual powers to them. But this study, ...
BUFFALO, N.Y. — Saliva is a bodily fluid most of us take for granted despite the significant roles it plays: aiding in digestion, maintaining strong teeth and defending against oral disease.
On dry nights, the San hunter-gatherers of Namibia often sleep under the stars. They have no electric lights or new Netflix releases keeping them awake. Yet when they rise in the morning, they haven’t ...
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