Another was a wasp that stings cock roaches and actually take over their brain by a carefully placed sting that inserts just the right amount of venom next to the roaches brain, then ‘steers’ the roach by it’s antennas, back to the hole where it lays its eggs on it.

There was about how some can be beneficial as well… apparently about the same period of time that humans eliminated hook worm infestations in themselves through better hygiene such as using toilets and out houses instead of pooping on the ground, some allergies became dramatically more prevalent. Some British guy who had bad asthma and allergies had stumbled across some this data doing some kind of research, and decided to experiment on himself. He got himself infected with hookworm, and what do ya know, his allergies cleared up!

Apparently having them in your intestines stimulates some kind of immune response that can affect how your body deals with allergic reactions. He is in the process of trying to sell hookworms to others and get research started on this.

When you see stories like this you realize that science is just beginning to unravel the depths to which all living things are connected.