Science

More than 3.4 million Pennsylvanians are supplied by drinking water containing radium that exceeds a strict California standard, which advocates say should replace a looser fe

Mice, rats, mosquitoes, lizards, and other animals are adapting to live in environments created by humans.

When it comes to anything other than earth disturbance or water crossings, the agency doesn’t have jurisdiction.

Sunoco/Energy Transfer Partners, which is building the $2.5 billion pipeline, paid for the report.

Eighty-six new star names have been approved by the International Astronomical Union, an association of professional astronomers. The nam ...

University of Pennsylvania students are working with the nonprofit ShelterBox to improve conditions for some of the millions uprooted from their homes.

The study looked at decades of streamwater data at U.S. Geological Survey monitoring sites.

Guests: Michael Mann, Jennifer Francis, Jennifer Dlouhy The frigid temperatures around the nation made President ...

Unusually low tides and high winds impacted the water levels in its intake canal.

Warming oceans put more moisture and energy into the atmosphere, creating conditions for stronger storms.

U.S. coal companies also ramped up production as demand in China increased.

It's the new "polar vortex."