It's a major discovery of the 21st century: knowing the structure of DNA has revolutionized our knowledge of life, medicine and science as a whole. In this TED Talk, Nobel Laureate James Watson ...

In a way, sequencing DNA is very simple: There's a molecule, you look at it, and you write down what you find. You'd think it would be easy—and, for any one letter in the sequence, it is. The problem ...