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The former International Space Station commander achieved Internet stardom with his in-space rendition of David Bowie's "Space Oddity." After three missions and a total of six months in space he shares what he's learned in a book, An Astronaut's Guide to Life on Earth.

A recent survey shows that furloughs and hiring freezes conspired to dampen morale. But if federal workers are feeling undervalued, their job security remains high.

Surgery to repair a damaged knee meniscus is very common, but it may not help a lot of people, a study finds. That may be because some people benefit more than others, and doctors still don't know who is going to get the most out of surgery.

Citing violent clashes between police and anti-government protesters, the country's Election Commission asked for a delay in the Feb. 2 vote.

Iowa initially chose not to expand Medicaid to thousands of beneficiaries under the Affordable Care Act. But it's come up with a plan that uses federal money to pay for expansion, while writing its own rules. Beneficiaries will have to pay a small premium, for instance.

The attack comes as Afghan President Hamid Karzai continues to deliberate over a security pact with the U.S. The Taliban has claimed responsibility for the bombing.

Delta Air Lines will honor some incredibly inexpensive tickets it mistakenly sold on Thursday. Some cross-country trips were going for as little as $25. When it's obvious a seller has made a big mistake in your favor, is it OK to buy anyway?

NASA's Cassini spacecraft focused on one of the planet's poles, and produced an image that resembles a hand-painted Christmas ornament. There's also a new photo of Saturn's largest moons that makes it appear they're stacked on top of each other.

The screenwriter, producer, director and actor, whose name has become synonymous with American comedy, talks about his penchant for spoofs and his decades-long friendship with Carl Reiner. Brooks is among a handful of people who've won Emmy, Grammy, Oscar and Tony awards.

Head injuries have long been considered a risk factor for Alzheimer's, but the evidence on that is mixed. A study finds that people who have memory problems decades after a concussion are more likely to have the brain plaques associated with Alzheimer's.