Scientists are beginning to understand how people tune in to a single voice in a crowded, noisy room.
This ability, known as the "cocktail party effect," appears to rely on areas of the brain that have completely filtered out unwanted sounds, researchers report in the journal Neuron. So when a person decides to focus on a particular speaker, other speakers "have no representation in those [brain] areas," says Elana Zion Golumbic of Columbia University.
Arkansas has approved a law banning most abortions after 12 weeks of gestation, as both houses of the state's legislature vote to override a veto by Democratic Gov. Mike Beebe. The Republican-backed Human Heartbeat Protection Act will become the nation's most restrictive law.
In vetoing the Senate version of the bill Monday, Beebe said that it "would impose a ban on a woman's right to choose an elective, nontherapeutic abortion well before viability."
More than three decades ago, Soviet soldier Bakhretdin Khakimov went missing in Afghanistan after he was wounded in battle with Afghan mujahedeen forces.
His whereabouts remained unknown until two weeks ago, when he was tracked down by a team from the Warriors-Internationalists Affairs Committee, a Moscow-based nonprofit that looks for Soviet MIAs in Afghanistan.
The death of Venezuelan President Hugo Chavez is an especially tough blow for Cuba, whose feeble state-run economy has been propped up for more than a decade with Venezuelan oil shipments and other subsidies.
The Castro government has declared three days of mourning, calling Chavez "a son" of Cuba, but privately Cubans are quietly fretting about the potential loss of billions in trade and the threat of a new economic crisis.