"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.

About 2,500 new alien plant and animal species including the raccoon and American lobster, could arrive in Europe by 2050, a new study predicts. University College London experts believe the number of ...

A 'biological invasion' of alien species is threatening life on Earth – with risks to human health, crops, and infrastructure, a new report finds. Around 37,000 alien species have entered new areas – ...

Claims that the Nazca mummies represent a new alien species originate from a self-published paper by a retired paleontologist ...

Invasive alien species are travelling around the world at “unprecedented rates” because of humans, threatening native plants and animals with extinction while damaging human health and livelihoods, ...

British windsurfers, sailors and rowers have been helping in the fight against invasive species – showing big sporting events like the Olympics can leave a legacy of biodiversity. Pumping the sail to ...

Anja Djuricic was born in Belgrade, Serbia, in 1992. Her first interest in film started very early, as she learned to speak English by watching Disney animated movies (and many, many reruns). Anja ...

Pockets of land and water that are free from ‘alien’ species are few and far between, finds Rachel Nuwer. Yet could we reverse the tide of these pests? When Piero Genovesi received my email, his ...