Certain parasitic worms survive by taking control of snail behavior. Instead of hiding, infected snails are driven into exposed areas where predators can easily find them. The worms manipulate ...

Scientists discovered that river otter droppings contain large numbers of parasites that infect the animals’ prey, indicating that otters may play a significant role in shaping local food webs.

Whether these questions will be answered remains to be seen, but given how they’ve remained mysteries for so long, chances ...