Science

The "Great Dying," the biggest extinction the planet has ever seen, happened some 250 million years ago and was largely caused by greenhouse gases in the atmosphere.

Pennsylvania has seen an abnormally high number of tornadoes this year — with more than two dozen confirmed as of last week.

While seaweed has a lot of things going for it in terms of nutrition, the lack of infrastructure to process it and people's tastes have not been quick to adopt it.

Developer and agencies deny effort to shield from public view plans that would allow for transfer of potentially explosive liquefied natural gas to ocean-going tankers.

Scientists are racing to figure out how it much could contribute to sea level rise and impact cites and coastlines thousands of miles away, including the Philly region.

"The bottom line is that ultimately they seem to be double counting — double charging essentially for the costs of backup generation," he says.

On Monday, 52 tornadoes may have touched down across eight states, says the National Oceanic and Atmospheric Administration.

There is a new Constellation to see – and this one is artificial! The first set of satellites dedicated to eventually providi ...

“What you’re seeing here is not unusual. What made it noteworthy is how persistent and stubborn that pattern has been.”

The Trump administration is committed to making fossil fuels cleaner rather than imposing "draconian" regulations on oil, gas and coal, U.S. Energy Secretary Rick Perry said.

Experts said there were tornadoes on Tuesday in Indiana, Bradford and Berks counties. There were no reports of injuries.

A nonprofit that tracks pollution in the Chesapeake Bay said Pennsylvania has failed to protect the nation's largest estuary from farm manure and stormwater.

To better understand opioid-use disorder, Camden researchers are starting a biobank to study brain and blood samples of people who’ve died of overdoses.

A new exhibit at the Science History Institute in Philadelphia tells the stories of scientists with disabilities — and shows how they overcame prejudice and marginalization.

The moon has two distinct faces; gravity readings of the moon’s surface by a lunar orbiting satellite suggest that not long after forma ...