A boulder-sized meteor that slammed into the moon in March caused the biggest lunar explosion ever observed by NASA. The strike, which packed as much punch as five tons of TNT, was so bright that anyone looking up at the moon at that moment could have spotted it -- no telescope required.

Speaking late Sunday, Russian space officials announced the return of a number of creatures from space, saying most died during their time in space.

Long-time readers might have kept up on the various military usages for dolphins. They can wield pistols, and they can help hunt for underwater mines. Generally, they haven’t been used in any sort of Indiana Jones-like archeological digs, which makes the discovery made by two dolphins off the cost of Coronado, Calif. all that much more impressive. The discovery: a Howell torpedo, a United States torpedo from the late 19th century, which was high military technology at the time.

NASA's first telescope dispatched to hunt for Earth-like planets that may support life elsewhere in the universe has lost use of its positioning system, threatening its mission, officials said on Wednesday.