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 ...

Lice have been bugging humans for as long as our species has been ... between 15 small sections of the louse genetic instruction book. The lice clustered genetically into two groups — one ...

But there's more to lice than their elimination. These parasites have been stowaways on our heads for so long that they've recorded our history as humans in their DNA. "We can think of human lice ...

But there's more to lice than their elimination. These parasites have been stowaways on our heads for so long that they've recorded our history as humans in their DNA. "We can think of human lice as ...

A new study, for example, found that some lice in the Americas are hybrids of those carried there by Native Americans and others ferried across the Atlantic by European colonists. “We humans do ...