Head lice have been constant, if unwanted, human companions for as long as our species has been around. Evidence of this ancient connection includes a 10,000-year-old louse found on human remains at ...

Head lice are considered a nuisance — a pest to be evicted from the hair on your head or the head of a loved one with a special comb or shampoo. But there's more to lice than their elimination. These ...

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Lice have irked humans for many centuries. In this 1497 woodcut printed in Strasburg, Germany, a man is de-loused. (Science & Society Picture Library via Getty Images) Head lice are considered a ...