What Are the Best Scientists Working On?

Last December, DISCOVER celebrated three researchers for the remarkable ways they were changing the world and our place in it. We named Jay Keasling, a pioneer in synthetic biology, our Scientist of the Year; neuroscientist John Donoghue and geneticist Svante Pääbo were runners-up. When we recently checked back with them, each had already pushed his work into new, even bolder territory.