: Some sci-fi aliens feel made up on the spot. Others seem so fully realized they could exist. This video explores the species with the deepest lore, logic, and worldbuilding in science fiction.

Introduction: Nonnative species in the world / David Pimentel -- The impacts of alien plants in Australia / Richard H. Groves -- Environmental and economic costs of invertebrate invasions in Australia ...

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

BEIJING -- China decided to begin a one-year action plan to prevent invasive alien species from entering border ports across ...

Republican Rep. Nancy Mace of South Carolina has introduced legislation that would make illegal immigrants who engage in animal cruelty inadmissible to the United States and subject to deportation.

One of the alien creatures brought to Earth in the crashed USCSS Maginot is an eye-like creature with tentacles dubbed the T. Ocellus. This creature was creepy to begin with, but Alien: Earth gave us ...