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Americans Andrew Z. Fire and Craig C. Mello win the Nobel Prize in Physiology or Medicine for discovering "RNA interference," a way organisms turn off individual genes. The discovery is considered by many scientists to be a breakthrough in modern biology.

Even though South Korean scientists apparently failed to make human embryonic stem cells from cloned human embryos, several teams around the world are still planning to achieve that goal. To do that, they will need a source of human eggs. But those eggs may be hard to come by.

The White House-backed immigration bill will go before the full Senate for debate today. Full Focus reporter Heather Hill has local reaction to the proposed bill from affected voices in San Diego.

Star writers gathered in New York City on Wednesday night for the National Book Awards ceremony. Books dealing with the events of Sept. 11, and war, were among the nominees. A graphic novel was also among the nominees, a first. Among the winners was Richard Powers' The Echo Maker, which took the prize for fiction.

The FDA has ordered new cautionary language for the flu drug Tamiflu, telling doctors and patients to be on the lookout for abnormal behavior in people taking the drug. More than 100 recent cases of delirium, hallucinations and other unusual psychiatric behavior have been reported in Japanese patients.

Proposition 77 is an initiative backed by Governor Arnold Schwarzenegger which would change the way congressional and state legislative boundaries are determined. Sacramento reporter Bob Hensley has m

Tom Burke is an environmental adviser to one of the world's largest mining operations and the British government. At heart, he's an environmental activist, but he's pragmatic about what it will take to shift corporate and political thinking on climate change.

Same Sex Marriage to Arnold's Rescue

Reporter Rebecca Tolin explores how your lifestyle as well as your genes can keep your brain young well into your golden years.

4 Months, 3 Weeks and 2 Days