It is often suggested that anyone who finds one of these invasive worms should kill it (carefully). Here's what else to know.

Is it the invasion of the genome snatchers? Just in case the idea of aliens walking around in human skin suits wasn’t frightening enough. An outlandish study asserts that aliens might have abducted us ...

In a proof-of-concept lab experiment, scientists demonstrated that intestinal parasites could make and release therapeutic ...