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Airships were once the giants of the skies. They were soaring before the airplane and were used as the first strategic bombers in World War I. What happened? Blimp technology has come a long way since the Hindenburg. Ira Flatow and guests discuss airships of the past and future.

By choosing Wisconsin Rep. Paul Ryan to deliver the official response to President Obama's State of the Union address Tuesday night, Republicans are sending the nation two messages about their priorities: Undo much of what Obama has done, but undo it in a civil way.

Even if carbon dioxide emissions were halted today, global warming and the environmental disruption that comes with it would continue for 1,000 years, says a sobering study. Scientists are urging politicians to proceed with caution as they set new target levels for emissions.

President Assad's former allies were turning on him in rapid succession, a sign of profound impatience with a leader who has failed to stem months of unrest that could explode into a regional conflagration. Up to 90 people, including Syrian troops, were killed in a gruesome wave of violence Monday, activists said.

A divided U.S. Supreme Court majority said the law violates the Constitution's guarantee of free expression.

Piracy thrives in largely lawless Somalia. But the self-ruling region of Somaliland is slowly trying to build the rule of law and a sense of civic duty. The result: Ordinary citizens occasionally catch pirates and turn them in.

Evidence has been mounting that intestinal parasites can actually be a good thing for people with inflammatory bowel disease, because certain parasitic worms seem to help the intestine heal. Now, new research yields clues to why the treatment may work.

Unemployment is still at record-high levels for all workers. But young workers have experienced the highest unemployment rates. The outlook for college students graduating this spring may not be great, but it is improving.

New York TV Festival Offers Development Deals to Winner

After a one-day weather delay, the Ares I-X rocket rumbled away from a former shuttle launchpad Wednesday morning at Florida's Kennedy Space Center. It's the first step in NASA's effort to return astronauts to the moon.