Penn engineering researchers modified a fungus called Aspergillus flavus, which may have caused lung disease and illness in ...

Delaware legislators approved bills on offshore wind, creating an Inspector General Office and limiting agreements with federal immigration authorities.

The heatwave that brought 100-degree temperatures to the Philadelphia region in June also brought warnings that the air quality was unhealthy for sensitive groups. This was not a coincidence.

The union that represents more than 9,000 city workers said in a post on X that it is resuming contract talks with Philadelphia officials as its strike continued for a fifth day.