For the first time, an experimental vaccine has prevented infection with the AIDS virus, a watershed event in the deadly epidemic and a surprising result. Recent failures led many scientists to think such a vaccine might never be possible.
The new findings, detailed in the Sept. 25 issue of the journal Science, come in the wake of further evidence of lunar polar water ice by NASA's Lunar Reconnaissance Orbiter and just weeks before the planned lunar impact of NASA's LCROSS satellite.
As local, state and federal authorities beef up security ahead of the G-20 summit in downtown Pittsburgh, several protest groups are claiming that they've been targeted in an attempt to silence demonstrators.
Libyan leader Muammar Qaddafi, declaring that "we'd be content and happy if Obama can stay president forever," launched into a rambling assault against the United Nations Security Council on Wednesday.