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' ...

My grandson Parker recently sent me an email and one of the strangest animal photos I have ever received. Most of my ecologist colleagues have never seen the critter that Parker found, but he knew ...

Threadlike worms living in the guts of certain insects make their hosts jump into water and drown. What scientists knew about these parasites resembling strands of spaghetti was already pretty bizarre ...

My grandson Parker recently sent me an email and one of the strangest animal photos I have ever received. Most of my ecologist colleagues have never seen the critter that Parker found, but he knew ...

Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Threadlike worms living in the guts of ...