Erik Irmer has been documenting the spread of invasive plant and animal species that disrupt native ecology across Europe. He focuses on humans’ interactions with these plants and animals. Aliens is p ...

"Star Trek" is home to countless alien species, many of whom offer beloved characters. Some are not. We rank the 10 most disturbing alien races in the galaxy.

The research is mounting up that we might not be alone in this big wide world. So what's the likelihood that aliens are out ...

With tons of "Star Trek" alien races depicted over the decades, consistency is a tall order. And in the case of these aliens, ...

Mega monsters, the gigantic beasts capable of crushing cities, have been a defining force in movies. Here are the most powerful ones ranked.