Science

The state's Department of Environmental Protection is investigating a potential case of tampering with water testing samples that showed high mercury levels in Upper Township.

Whether it be from damaging weather conditions, diseases, fungi or insect infestations, a sick or dying tree can be dangerous — and hard to spot.

Hankin Group aims to restore the floodplain along the Lionville Run in Exton, Chester County.

Election security experts warn that underfunding and a lack of expertise in the field could threaten election integrity.

Ahead of the election, we look at how politics is affecting everything from health care to scientific progress.

The money will help the utility improve the safety of its distribution lines and reduce climate-warming emissions.

Municipalities must locate and replace lead pipes over the next decade. Here’s what you need to know.

Fear is about survival, but it can also feel fun. We explore our complicated relationship with fear.

Archaeologists in Denmark have unearthed a Viking Age burial ground containing some 50 “exceptionally well-preserved” skeletons.

Jackie Robinson, a building trades instructor, spent time in prison but now works at a nonprofit that teaches students how to make homes more climate-friendly.

The federal money will support the state’s move toward more electric vehicles by adding overnight, fast and ultra-fast truck chargers on I-95.

More than 70% of homes in Pennsylvania are estimated to have been built before the 1978 lead paint ban, leaving many kids vulnerable to lead poisoning.

Although bipartisan support for fracking remains high among public officials, Pennsylvania voters continue to be divided and support increased regulation.

Historic dams along the Brandywine River are helping the museum get off the electrical grid.

Once the site of America’s worst nuclear accident, Three Mile Island may get new life as a power source for Microsoft data centers. Is it key to our green energy future?