An invasive species of fish called the northern snakehead has earned the nickname "Frankenfish." Learn why they are a ...

Craspedacusta sowerbii aren't frequently seen in their adult, "medusa" form. The invasive species likely came from Asia in ...

Particularly north and west of the Lehigh Valley, anyone who might be especially vulnerable to the effects of air pollution ...

Under a Code Orange alert, it's recommended that children, older adults and those with respiratory illnesses limit time spent ...

On Tuesday at 4:47 p.m. an air quality alert was reported by the National Weather Service in effect until Thursday at ...

An updated air quality alert was reported by the National Weather Service on Tuesday at 4:52 p.m. in effect until Thursday at ...

When combined with the Philly area’s warm, sunny weather, the incoming smoke stands to increase levels of ozone, the ...

York County’s air quality will be improved but could still cause problems for those sensitive to particle pollution.

Air quality alerts are in effect on Tuesday in 10 states as toxic smoke from hundreds of wildfires burning in Canada ...

Air quality alerts are in effect in the Philadelphia area, fueled by smoke from wildfires that are burning thousands of miles ...

A rare freshwater jellyfish was spotted last month in Lake Erie, according to Pennsylvania officials. Ray Walter, an intern with the Pennsylvania Department of Environmental Protection, came across a ...

An air quality alert is in effect for Eastern and Central Pennsylvania on August 5. According to the Department of ...