a species of fish related to piranhas. Nearly 200 years later, scientists conducting genetic analyses on a population of M.

Piranhas are fish that live in the Amazon River and lakes in South America, known for their razor-sharp teeth and fierce attacks on other kinds of fish. But are they really as aggressive as they ...

River pirates and guerrilla rebels. Jaguars in the rain forest, piranha in the water and armed ... a Brazilian island in the Amazon that juts out into the Atlantic. They followed the coast ...