Lice have been found feeding on the skin and blood of free-range chickens, which are infected at much higher rates than caged flocks. This finding could have implications for states like California, ...

There was a time, at least 90 million years ago, when mammals might have been blissfully free of lice. But it wasn’t to last. An ancient mammalian ancestor of today’s elephants and elephant shrews ...

Children have returned to school and are bringing home stories about the things they learned and the friends they made. But some parents are concerned they could also be bringing home a tiny nuisance ...