United StatesNational Aeronautics and Space Administration

Fright of the Navigator

by David Morrison,

From messages sent to NASA’s “Ask an Astrobiologist” Web page. David Morrison, who responds to the questions, has received more than 5,000 messages related to “Doomsday 2012” and the planet…

Starship Trooper

by James C. McLane III,

Space auditing

by George Deutsch,

Backseat space walkers

by Harper’s Staff,

Lost in space

by Lawrence Ross,

The art of the dodge

by Harper’s Staff,

Manna from NASA

by Glenda Adams,

Martyrs on the moon?

by Carl Dreher,

The missile mess

by Frank Gibney,