MARJORIE SHAFFER has written for The New York Times, TheFinancial Times, and Popular Science magazine. She was a business reporter for Reuters and a former Knight science journalism fellow at the Massachusetts Institute of Technology. A graduate of Brown University, she received a Master of Science degree in biology from the University of Illinois, Urbana-Champaign. She is currently a science writer and editor at New York University School of Medicine. She lives in New York City.