Republicans in Congress are trying to remove protections for gray wolves under the Endangered Species Act and block courts ...

Deep in the Everglades, a voracious reptile with attractive spotted scales is among one of the state's most worrisome invasive species. The Argentine black-and-white tegu, a large lizard that can grow ...

Researchers discovered a prehistoric ecosystem filled with giant marine reptiles, revealing an unparalleled level of food web complexity. Predators that dominated the oceans 130 million years ago were ...

Across North America, mountain lions, bears and gray wolves have made a remarkable comeback over the last 50 years. Once ...