Add Yahoo as a preferred source to see more of our stories on Google. Horsehair worms can control a host's brain and steer it to water, where it drowns. Scientists have studied the worms' ...

Parasites rarely settle for a simple relationship with their hosts. In fact, some of the most fascinating creatures in this category actively change how their victims behave. Among them are horsehair ...

For a praying mantis, eating the wrong insect can be a one-way ticket to a watery grave. Some of its typical bug prey contain horsehair worms, Chordodes fukuii, which grow in a mantid's gut—and ...