Reuters - Nearly 8,000 older Americans who fell and banged their heads died from the brain injury in 2005, according to a government study released on Monday.

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. Too big of a temperature difference can make a tomato literally suck water inside the fruit through the scar where its stem used to be. If salmonella happens to be lurking on the skin, that's one way it can penetrate and, if the tomato isn't eaten right away, have time to multiply.

Reuters - Nearly 8,000 older Americans who fell and banged their heads died from the brain injury in 2005, according to a government study released on Monday.

AP - Researchers have uncovered a new clue to the cause of Alzheimer's disease.

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.