The Amazon sailfin catfish is characterised by a body covered with bony plates and a thick, armoured structure. Native to ...

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 ...

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 ...

Are we alone in this universe? Is there intelligent life out there? Or are they living among us? Humans have wondered about ...

Sir Ridley Scott's long-awaited return to the Alien franchise was cause for celebration among sci-fi fans but 2012's Prometheus wasn't exactly what the majority had expected. Rather than being a ...

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