From the archives: An MIT expert on national security technology tells us why the current missile defense project won't ever be able to do its job--and offers a better alternative (from the April, 2002 issue).
From the Editor in Chief
The color-blind Web: a techno-utopia, or a fantasy to assuage liberal guilt?
"Deny-use" technology could prevent terrorism and jump-start the economy.
New software tools may improve communication during catastrophic events.
New tools have computers seeing things.
Bringing artificial bones to life.
Software screens digital images for secret messages.
NASA's fastest jet blew up in its maiden flight. Now, scientists say they know what happened and are ready to try again.