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 ...

The jumpy parasites have followed our ancestors around for at least 25 million years, adapting along with us through major upheavals. By Carl Zimmer Along our evolutionary journey from monkey-like ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Reviled the world over for making our scalps itch and rapidly ...