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So-called biosimilar drugs closely mimic existing drugs but are made from living cells, blood components and tissue. In some cases, they could substantially reduce the cost of drugs.

The very first festival dedicated to movies shot aerially with drones takes place in New York City tomorrow night.

Polymath Terry Moore wondered why "X" is the universal unknown in algebra. He dove into the history of numbers to come up with an unexpected answer.

On March 7, 1965, marchers from Selma, Ala., attempted to cross a bridge to demonstrate in support of voting rights. Selma director Ava DuVernay, John Lewis and J.L. Chestnut reflect on that day.

Keystone Crossroads publishes a weekly roundup of links related to Pennsylvania cities. It's Friday! Here's a roundup of recommended reading from this…

The Donner Party has a dark history. So how do you explain it to kids? NPR's Scott Simon talks to Tom Fay, one of the descendants of the Donner Party, about his family history.

The Americans with Disabilities Act was a watershed piece of legislation. As we approach the 25th anniversary of the ADA, advocates want to fold another facet of daily life into the law: the Internet.

Some conservative representatives in the House are unhappy with House Speaker John Boehner and they want to replace him. Can they do it?

Forget whatever you thought you knew about the famous gunfight at the O.K. Corral. Mary Doria Russell's new novel is an epic investigation into all the things that made the bloodshed inevitable.

In 2011, while deployed in Afghanistan, Lance Cpl. Erik Galvan had a bad feeling about a wooded area. Sgt. Daniel Wheeler ordered him to go in anyway. The next thing Galvan saw was the blast.