DuPont's energetic chairman is reinventing the nearly 200-year-old chemical company, shifting its emphasis to biology-based materials and electronic displays.
Wireless sensors probe the infrastructure.
The philosophers got it wrong: scientists love new ideas-if they're right.
Medicine: New imagers offer an unprecedented view.
With research on embryonic stem cells mired in controversy, adult stem cells are quietly providing the basis for striking advances toward new therapies.
Synthetic peptide rings can self-assemble into antibiotic nanotubes that puncture deadly bacteria.