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Planetary ScienceLost in Space: Comet mission appears to have broken apart
A spacecraft that had just begun its journey to two comets has fallen silent and may have broken apart.
By Ron Cowen -
EarthGlobal Impact: Space object may have spread debris worldwide
Sediments laid down about 3.47 billion years ago in what are now western Australia and eastern South Africa contain remnants of what may have been an extraterrestrial-object impact large enough to disperse debris over the entire planet.
By Sid Perkins -
Anthrax Stopper: Viral enzyme detects, kills bacterium
A virus that preys upon the anthrax bacterium produces an enzyme that can be exploited to detect and kill the biowarfare agent.