Every day, on nearly every ship cruising the world's oceans and lakes, millions of stowaways are hitching a lift. When set free at the end of their voyage, some set up home in their new surroundings - ...

Introduced species generally get a bad press – but not all alien invaders are villains, says Ken Thompson in Where Do Camels Belong? WE HAVE all heard a lot of bad stuff about introduced species: they ...

LOMA, Colo. — Water is a driving force in the American West, and today it’s at risk more than ever. Not just from overuse, not just from megadrought, but from minuscule invaders that pose a nearly ...