Why is the heart slightly on the left side of the body for most people? Why is DNA almost always a right-handed helix? Same with alpha helices, the building blocks of proteins. Chirality, or ...

After two years of failure, Griffith finally found an answer. Using a delicate technique that he describes as “more witchcraft than science,” he began spraying his DNA samples with a thin coating of ...

DNA can sustain serious injuries called double strand breaks, in which both strands of the helix snap. These breaks are among ...

On a foggy Saturday morning in 1953, a tall, skinny 24-year-old man fiddled with shapes he had cut out of cardboard. They represented fragments of a DNA molecule, and young James Watson was trying to ...

To our immune system, a potentially lifesaving gene therapy can look a lot like a dangerous infection. That's because most ...

James D. Watson, whose co-discovery of the twisted-ladder structure of DNA in 1953 helped light the long fuse on a revolution in medicine, crimefighting, genealogy and ethics, has died. He was 97.The ...