How 3-D ultrasound works.
Software based on rules, examples, or statistics seeks to erase language barriers. It's far from perfect, but sometimes close is good enough.
An international project to map genetic differences between population groups could be an invaluable resource for treating human disease. But will it perpetuate ethnic stereotypes?
Electronic medical records help track and treat the homeless.
Visual fake-out should foil the 'spambots' used by junk-mail purveyors.
RNA-based method thwarts blood vessels.
Proteins seen as a versatile platform for making tiny wires.
Geron CEO Thomas B. Okarma on creating stem cell therapies.
From the Editor in Chief
Innovative processes, not just products, are targets for activists.