Mark Strassmann and Reid Orvedahl | Aug. 11, 2013 | CBS News Chicago
It's an invasion from coast to coast, from Africanized killer honey bees in the Southwest to South American nutria in Louisiana, to the spread of the Burmese python in the Florida Everglades ... all part of a scary trend.
"Everywhere we look, we see species that are spreading and damaging our natural ecosystems," said University of Notre Dame biologist David Lodge. "And when scientists look into the future, they see the potential for many more damaging species."