New Life Form? Doctors claim to have uncovered new evidence that the tiny particles known as "nannobacteria" are indeed alive and may cause a range of human illnesses. Other researchers disagree.
Scientists have created a miniature medical computer out of DNA that can detect cancer genes in a test tube and respond by releasing a drug. However, an injectable version [of the nanoscale robots] would have to work inside cells, and that accomplishment could take decades. Says Shapiro: "I'm not sure it will be within my lifetime."