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 ...

Imagine two drops of rain landing high in the Andes. One takes the short, steep path to the Pacific, a mere 70 miles to the west. The other sets off on a 4,000-mile journey to the Atlantic ...

The world’s largest water lily with giant floating leaves and fragrant white flowers, blooming only at night. An intricate flower with purple, white, and blue hues, it’s both a pollinator ...