There are just some things that insert themselves where they are unwanted, and when plants and animals insert themselves into areas they aren't supposed to be in it can damage an ecosystem.

Forty-six crayfish collected in the Ocoee River Gorge in southern Tennessee are part of a new species, researchers said in a study. Photo from senior author Roger F. Thoma A researcher was wading ...

“I’m hopeful the Fish and Wildlife Service will do what’s right to protect the Barrens darter and its unique central Tennessee habitat,” Townsend said. “Endangered Species Act protections are ...