Scientists snap a picture of DNA’s double helix for the very first time

For the last 60 years, scientists have known that DNA's structure is composed of a spiraling corkscrew. They know this thanks to molecular theory and and an old-time technique called X-ray crystallography, where patterns of dots are converted into an overarching image using mathematics. But now, using an electron… » 11/29/12 9:45am 11/29/12 9:45am