Purple is the new green, as far as aliens are concerned, anyway. If you were asked to imagine an alien planet, it would be reasonable to imagine a green earth-like rock orbiting somewhere in a distant ...

A lot of people think of plants as pretty to look at, but defenceless and passive as far as organisms go. However, the many alien species – or “monster plants” – around us show we should never ...

Invasive alien species are one of the biggest drivers of biodiversity loss, and pose a serious threat to ecosystems, food security and livelihoods around the world, a team of international researchers ...

As an astrobiologist, I often get asked how aliens would look. What people usually mean by “aliens” are complex, animal-like aliens—often humanoid in form. From the natural history of life on our own ...

An “alien plant” fossil discovered 55 years ago just outside of an abandoned town in Utah has no relation to any currently existing or extinct species, scientists revealed in a study last month.

The number of alien (non-native) species is expected to increase globally by 36% by the middle of this century, compared to 2005, finds new research. The number of alien (non-native) species, ...

Alien species are taking over nature. Rogue rats are running amok on remote islands, predatory crayfish are cruising English rivers, Japanese knotweed is strangling South Wales, water hyacinth is ...

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 ...