Visual fake-out should foil the 'spambots' used by junk-mail purveyors.
RNA-based method thwarts blood vessels.
T-rays could be more versatile than x-rays.
Tiny networked sensors that communicate through wireless links are being readied for market.
Software tricks borrowed from the world of particle physics are helping law enforcement agencies sift through mountains of information.
Proteins seen as a versatile platform for making tiny wires.
Geron CEO Thomas B. Okarma on creating stem cell therapies.
Anti-spam schemes that force people to prove they aren't machines won't work.
Cheap computer power and high-tech observation systems mean precise forecasts, offering consumers personalized reports and saving weather-sensitive businesses millions.
University of Pennsylvania biophysicist Britton Chance demonstrates the latest in lie detection technology.