The animals are not aliens, but giant pile worms, large marine worms that are typically found on the seafloor, but will swarm at the water’s surface to mate, Benjamin Neal, biologist and assistant ...

The worms can cause canine schistosomiasis ... that the tiny flatworms could be spreading throughout the Colorado River and smaller rivers that feed into it, providing a broader expansion than ...

Niger has become the first African country to eliminate river blindness, a parasitic disease that is the second-leading cause of blindness in the world, the WHO said Thursday.