A Moment of Science
Fingernails. They're good for scratching, biting, clipping, and polishing. But what are they, in fact?
Horns and antlers have some important things in common.
It turns out, tears are more essential than might have thought. This Moment of Science looks at the chemistry of tears.
Split ends are a common enough hair complaint, but do you know what precisely is splitting, and how, and why? In order to answer these questions and more, a quick hair anatomy lesson. Learn more on this Moment of Science.
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