Republicans put Lieberman in convention spotlight
WASHINGTON - Republicans relegated President Bush to a brief, offsite cameo at their national convention Tuesday night and awarded one-time Democratic vice presidential candidate Joseph Lieberman a prime-time speaking slot as they courted millions of independent voters essential to John McCain's presidential hopes.
One day after a frightening Gulf Coast hurricane prompted a subdued opening to the McCain convention, political combat enjoyed a resurgence.
McCain's aides disputed a claim that vice presidential running mate Sarah Palin had once been a member of a third party - and accused Democratic rival Barack Obama's camp of spreading false information.
Obama spokesman Bill Burton said that as far as he'd seen, "the only person talking about her being in the Alaska Independence Party is the head of the Alaska Independence Party."
Memory-challenged may boost brain with exercise
CHICAGO - Brisk walking led to slight improvements on mental tests for older people with memory problems in what is billed as the first rigorous test of exercise on the aging brain. The results from the small Australian study were only modest. But they back up observational studies showing potential mental benefits from physical activity.
The effects of exercise were at least as good, if not better, than those seen with drugs approved to aid mental function in Alzheimer's disease, according to experts not involved in the study.
Still, the study's authors cautioned that the results don't prove that exercise will produce meaningful improvement in brain function or memory.
The authors said it's not clear how exercise might affect brain function; one theory is that it improves blood flow to the brain.
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