: 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 ...

Six Chinese government departments including the General Administration of Customs, the Ministry of Agriculture and Rural ...

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.

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