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American scientists Richard Axel and Linda Buck are awarded this year's Nobel Prize in Physiology or Medicine for their work on the sense of smell. Their research solved the mystery of how the brain is able to distinguish between odors. NPR's Richard Knox reports.

Turkey has been trying to join the European Union for 40 years. There are concerns about Turkey's poor human rights record, poverty and majority Muslim population. Those issues are particularly sensitive in Germany, which already has more than 2 million Turkish immigrants. NPR's Emily Harris reports.

The top U.S. commander in northern Iraq says that this week's deadly attack on a U.S. base near the city of Mosul may have been the work of a suicide bomber wearing an Iraqi military uniform. Brig. Gen. Carter Ham says he is concerned the attack's success may encourage similar attempts. NPR's Vicky O'Hara reports.

A group of students contemplates the dilemma facing Meriwether Lewis and William Clark in 1805: where to spend the winter after they had reached the Pacific Ocean. Colin Fogarty of Oregon Public Broadcasting reports.

Efforts are under way to arrange a ceasefire in the Baghdad slum of Sadr City, where militiamen loyal to Shiite cleric Muqtada al-Sadr have been battling U.S. forces. Sadr's aides have been negotiating with officials of Iraq's interim government, but no deal has yet been announced. NPR's Emily Harris reports.

Magnetic resonance imaging reveals that the parts of the brain used to perceive an object overlap with those used to imagine that object. The test is the first to reveal the biological basis for the persistence of memories that never really happened. NPR's Michelle Trudeau reports.

One in four U.S. jobs now qualifies as low income, according to the Census Bureau. NPR's Elaine Korry reports on the efforts of Levi-Strauss and Co., to help workers cope with -- and avoid -- a crisis.

This holiday season is expected to be the busiest in the airline industry since before Sept. 11. While passenger traffic has returned to its pre-Sept. 11 levels this year, airlines' finances have not. High-flying crude oil prices helped dash the industry's hopes for financial stability. NPR's Scott Horsley reports.

NPR's Michele Norris talks with Boston Globe technology reporter Hiawatha Bray about this year's video game offerings, which include realistically violent games such as Halo 2 and Doom 3; morally controversial ones such as Grand Theft Auto; and some games that the whole family can enjoy.

At the Pentagon, Chairman of the Joint Chiefs of Staff Gen. Richard Myers says Tuesday's attack at the U.S. military base outside Mosul appeared to be a result of an improvised explosive device (IED) worn by an attacker. The military will try to determine how the explosives were smuggled onto the base, and by whom. NPR's Vicky O'Hara reports.