Thousands of alien species could invade the Arctic, warns a new study. Warmer temperatures and more tourists make it easier for non-native plants and animals to get a foothold in far northerly ...

The most beloved beings from strange new worlds.

But the real truth is that alien life on other planets could be even stranger than floating balloons or amorphous organisms ...

More than 2,500 alien plant species could find suitable conditions in the Arctic, especially in northern Norway and Svalbard.