Across the world, strange environmental transformations are taking place. Many suspect they are part of an epic rearrangement of life on earth that is being driven by alien invaders - plants and animals turning up where they don't belong.

Originally released by National Geographic, 2004. Streaming video file encoded with permission for digital streaming by Infobase on April 07, 2015.

Traveling Alien Species (4:46); --Humans Role in Introducing Alien Species (6:55); -- New Orleans (5:35); -- Alien Species and Health (8:00); -- Biocontrol (4:58); -- Non-Native Plants and Animals in the United States (7:04); -- Miconia (4:43); -- Species without Borders (8:56); .