AP - Pick a tomato in the blazing sun and plunge it straight into cold water. If that happened on the way to market, it might be contaminated.

AP - Researchers have uncovered a new clue to the cause of Alzheimer's disease. The brains of people with the memory-robbing form of dementia are cluttered with a plaque made up of beta-amyloid, a sticky protein. But there long has been a question whether this is a cause of the disease or a side effect. Also involved are tangles of a protein called tau; some scientists suspect this is the cause.

AP - The government acknowledged that an outbreak of one of the most contagious animal diseases from any of five locations being considered for a new high-security laboratory — an event it considered highly unlikely — would be more devastating to the U.S. economy than an outbreak from the isolated island lab where such research is now conducted.

Reuters - Falling levels of a hormone called leptin that helps the brain resist tempting foods may explain why people who lose weight often have a hard time keeping it off, U.S. researchers said on Friday.

AP - There may be a break in the salmonella case: Food and Drug Administration inspectors headed for farms in Florida and Mexico on Friday, as new clues emerge to the possible source of salmonella-tainted tomatoes that have now sickened 552 people.

AFP - The number of girls under the age of 14 having an abortion jumped by over 20 percent in 2007, new figures from the Department of Health show, leading to calls for more government-backed sexual health counselling and contraception services.