Health & Science

North American river otters once lived in every major river system in Pennsylvania. But because of development, otters largely disappeared from the state by the early 1900s.

Repairs to a broken air pollution control device could take two more weeks, a refinery official said.

The EPA regulated "forever chemicals" last year, but recently proposed to rescind certain restrictions.

The air pollutant sulfur dioxide can make breathing harder for people with asthma. The refinery has been releasing it for several days.

On this rebroadcast of The Pulse: Before dinosaurs, before trees — even before Saturn had its rings – there were sharks. The fierce p ...

About 4,500 people are working inside Amazon’s fulfillment center in Wilmington at any given time. After renovations, some of their newest coworkers will be robots.

The federal budget bill, passed by the U.S. House of Representatives last week, would add Medicaid work requirements for childless adults to stay in the program.

Inspira Health Network would be hardest hit if Health Professionals and Allied Employees, the state’s largest nurses union, choose to go on strike.

The pending acquisition includes two facilities in Glen Mills, a location in Havertown, an office in Broomall and a site in Media.

City falcons have successfully added buildings and bridges to the their natural habitats in cities such as Elizabeth, New Jersey.

Researchers say losing USAID funding means less research that benefits the U.S. government, fewer opportunities for students, and a loss of trust in the U.S. overseas.

Why researchers say the Asian longhorned tick is spreading so rapidly — and why it could pose a serious threat to human and animal health.

For 30 years, Kathy Sanders has sought answers about the terrorist attack that killed her grandsons. She hopes a new piece of evidence will bring her closer to the truth.

Poison control experts say calls related to GLP-1 weight-loss drugs like Wegovy and Zepbound are rising, with symptoms like nausea, vomiting and abdominal pain.

In the “post-truth era,” we explore standards of proof, evidence, and how we know what we think we know.