Potomac Riverkeeper Network members are concerned about the potential environmental impact from the Jan. 29 plane-copter crash in the Potomac River.

Debbie Palmer, a local fossil enthusiast, has added a significant piece to the Calvert Marine Museum’s collection with her recent donation of a woolly mammoth molar from the Ice Age. Discovered in ...

The streams proposed for protection as critical habitat for the green floater are found in the Potomac watershed in Maryland, Pennsylvania and West Virginia; the Susquehanna watershed in New York and ...