ScienceU.S. may keep nuclear warheads handy for giant asteroid threat Some Cold War nuclear warheads may be retained for possible use against threatening asteroids, U.S. report says. Weapons could be launched into space to deflect approaching asteroids, experts say.by Jim Algar
ScienceU.S., India space agencies sign agreement as partners in exploration of Mars and Earthby Sumit Passary
ScienceSierra Nevada Corp. challenges NASA-Boeing/SpaceX $6.8 billion space taxi deal: Source selection process smack of 'inconsistencies'by Rhodi Lee
ScienceMars rover Curiosity drills into Mount Sharp to collect samples and finds mysterious 'ball'by Rhodi Lee
ScienceMaven, Mangalyaan celebrate Mars orbit entry by sending back first photos of Red Planetby Rhodi Lee
CultureSpace buddies? NASA's Mars rover Curiosity tweets hello to India's Mangalyaan probeby Jan Dizon