Historic file release: The Pentagon unveiled decades of UFO-related documents from the FBI, NASA, and State Department, some dating back to the 1940s. Unusual sightings logged: Reports include erratic ...

First files due: The initial UFO disclosures are expected Friday, including pilot reports and possibly one video, but ...

Biological invasions occur when organisms such as animals and plants are introduced by people to regions of the world where they do not naturally occur. In these new locations, these organisms are ...

Increases in global trade and travel are causing animal and plant species to be more frequently introduced to regions of the ...