Shuttle crew in Florida for practice countdown

CAPE CANAVERAL, Florida (Reuters) - NASA's next space shuttle crew arrived at Florida's Kennedy Space Center on Monday for a dress rehearsal of the late August launch of a mission to restart construction of the International Space Station. WASHINGTON (Reuters) - An Alzheimer's pill that helps slow the brain damage caused by the disease may also protect against the effects of nerve gases and pesticides, U.S. researchers reported on Monday. WASHINGTON (Reuters) - Ultrasound disrupts the brain development of unborn mice, U.S. researchers said in a study published on Monday that adds to growing evidence that too many ultrasound scans could also affect human fetuses.