Science

A portion of trail remains closed after testing found small amounts of contamination on the property. Evidence shows similar contamination documented two years ago.

Amid the summer heat, we explore the history and future of cold technology, from innovations in freezing to the next generation of air conditioners.

AI-powered therapy bots are gaining popularity, but researchers caution that not every service claiming to be a therapist qualifies as one.

We can all use an assist every now and then — but asking for it can be tough. We hear stories about the struggles of asking for help.

MACH2 leaders say the business networking events don’t preclude community engagement. Activists say they’re an example of exclusivity.

Clean energy advocates say the city is trying to block transparency regarding PGW’s budget process. The city says it needs to make the process more efficient.

Up to 1 million horseshoe crabs in the U.S. are harvested for biomedical purposes. A synthetic alternative could mean less harvesting of the “living fossils.”

Before great white sharks, megalodons ruled the oceans. What researchers have learned about these apex predators and their extinction.

The invasive insect appeared in Pennsylvania 10 years ago and continues to spread west, as far away as Illinois.

13 years ago, AJ Rotondella realized he could catch sharks from the beach. He’s been hooked ever since, even moving across states to chase sharks.

We take a deep dive into the secret lives of sharks — from their history, to the threats they face, to what makes them special.

There is no general cure for HIV, a chronic disease that affects more than 39 million people globally, including more than 18,000 in Philadelphia.

Researchers are seeking FDA approval for their soy-based bandages, which they say are an alternative to other synthetic and animal-derived products.

The study focused on semaglutide, the active ingredient in drugs such as Wegovy and Ozempic. It is known to reduce feelings of hunger while increasing feelings of nausea.

The last shark spotted in the Delaware River was in 1960.