More than 2,500 plant species have the potential to invade the Arctic at the expense of the species that belong there. Norway is one of the areas that is particularly at risk.

Many non-native plants could survive in the Arctic, as rising temperatures and human activity make it easier for invasive plants to arrive.

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 ...

They’re UFOs — unidentified floating objects. Online denizens were left baffled after mysterious blobs were spotted in an Oklahoma lake — with many comparing them to “alien eggs.” The Oklahoma ...

Star Trek has introduced a host of different alien species over the decades, but the past 17 years have seen four of the most famous decimated.

More than 2500 plant species have the potential to invade the Arctic at the expense of the species that belong there. Norway ...