Rajshekhar Gaji was staring at something that should not exist. Under his microscope, parasites that should have been ...

Decades ago, the U.S. eradicated this disturbing fly after it devastated livestock, but it's recently returned, bringing its ...

When most people think of worms, they imagine harmless garden creatures wriggling through soil. Yet, the world of worms is far more sinister. Some are terrifying predators, invasive parasites, or ...