A 3-D medical imaging system helps surgeons perform less invasive, safer operations.
DNA segments passed down from common ancestors can be surprisingly large-which could accelerate the hunt for common disorders.
Why scientists are busily developing new vaccines-and why they are years away from stockpiling what we may need.
Drugs of the near future will be microdevices that search out and destroy germs without the side effects of conventional therapies.
Tissue engineering promises to repair and even replace damaged body parts.