CAPE CANAVERAL, Fla. A NASA spacecraft rammed an asteroid at blistering speed Monday in an unprecedented dress rehearsal for the day a killer rock menaces Earth.
CAPE CANAVERAL, Fla. A NASA spacecraft rammed an asteroid at blistering speed Monday in an unprecedented dress rehearsal for the day a killer rock menaces Earth.
A NASA spacecraft rammed an asteroid at blistering speed Monday in an unprecedented dress rehearsal for the day a killer rock menaces Earth. The galactic slam occurred at a harmless asteroid 9.6 million kilometers away, with the spacecraft named Dart plowing into the space rock at 22,500 kph. Scientists expected the impact to carve out…