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 ability of alien plant species to invade a region depends not only on attributes of the plant, but on characteristics of the habitat being invaded. Here, we examine characteristics that may ...

Researchers conducted the first analysis ever to determine our planet's global hotspots where existence of alien plants and animals is the greatest. Alien plants and animals are those living beings ...