Science

There's no way to predict what strain of the shape-shifting flu virus could trigger another pandemic or, given modern medical tools, how bad it might be.

Of the remaining cohort of Earthlings privileged to set foot on the moon, let’s extend 88th birthday greetings this week to Buzz Al ...

More than two dozen wind farms popped up across the state leading up to 2012, but only one in the years since.

The case is centered on a 2014 ban and a subsequent municipal charter adopted by Grant Township that banned fracking wastewater injection projects.

The settlement pertains to 10 coal-fired power plants around the state that have been operating on expired water pollution permits for years — in one case for 17 years.

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.