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A test of a nasal vaccine against norovirus suggests it may be possible to immunize people against the virus, a common cause of foodborne illness.

Mythbusters has tried out a lot of things in the last few years, but trying a cannonball fired through a residential neighborhood? That was an accident.

A study released this week found that many eco-labels for farmed seafood don't guarantee the fish was raised in a way that protects the marine environment.

Scientists have found what they say is the world's oldest bed: a 77,000-year-old grass and leaf mattress in a cave in South Africa. And the people who made it were crafty: Atop layers of sedge grass were leaves from a plant known to repel insects — key for living in buggy, dank caves.

The place where the Sept. 11 mastermind was once held is in a residential neighborhood in Bucharest.

Russian lawyer and blogger Alexei Navalny is the darling of protesters and the bete noire of the Kremlin. His fight against economic corruption made him famous — as did his nickname for the allies of Vladimir Putin: "the party of crooks and thieves." And his arrest this week for protesting against alleged fraud in the recent parliamentary election is likely to raise his profile even higher.

Frustrated by what some see as U.S. foot-dragging on climate policy, an American college student interrupted U.S. envoy Todd Stern Thursday during his remarks at the climate conference in South Africa. Later, Stern emphasized that the U.S. has been working hard to advance global climate policy into the 21st century.

Eric Holder faced scrutiny from the Republican-dominated House Judiciary Committee on Thursday regarding the "Fast and Furious" initiative meant to keep guns from reaching Mexican cartels. Holder denied misleading Congress when hundreds of weapons were found at border town crime scenes.

President Obama has been accused of appeasement by both political supporters and foes. Liberals says he's been too willing to compromise. Republicans say he's not doing enough to constrain U.S. enemies in the Middle East, specifically Iran. At a news conference Thursday, Obama said, "Ask Osama bin Laden ... whether I engage in appeasement."

Calling someone a "rat" is no compliment, but a new study shows that rats actually are empathetic and will altruistically lend a helping paw to a cage mate who is stuck in a trap.