The Future of Terrorism
Neutron cameras versus smuggled nuclear bombs. Biodetectors versus bioengineered smallpox. Is technology making us safer—or more vulnerable?
The Extreme Sport of Origami
A physicist's computer program speeds the creation of stupefyingly complex paper sculptures.
Reasonable Doubt
Questions about the forensic infallibility of DNA emerge even as police begin to use it to profile suspect by race.
Million-Ring Circus
Swooping past Saturn's beautiful rings, the Cassini spacecraft starts to crack the code of the most complex structure in the solar system.