The sea is dark and full of terrors. There may or may not be water on Mars, but there are apparently Martians in the water. A ...

WARSAW, Poland (AP) — A respected Polish scientific institute has classified domestic cats as an “invasive alien species,” citing the damage they cause to birds and other wildlife. Some cat lovers ...

The Xenomorphs are arguably the greatest movie monsters of all time; a petrifying bundle of invasive parasites, weaponized jaws, and dangerously acidic blood. When director Ridley Scott teamed up with ...

A new glass sponge species is so strange that has been given the name named Advhena magnifica, which means "magnificent alien ...

Introduction: Nonnative species in the world / David Pimentel -- The impacts of alien plants in Australia / Richard H. Groves -- Environmental and economic costs of invertebrate invasions in Australia ...

The Predator, otherwise known as Yautja, is an ancient race of aliens with a complicated origin history. Like their alien opponents, the Xenomorphs, there are a few competing theories to investigate.