Kevin Krajick is senior editor for science news at Columbia University's Earth Institute, whose researchers carry out fieldwork on every continent and ocean. His stories on science, immigration, criminal justice and other subjects have appeared in National Geographic, Newsweek, the New Yorker, Science, Smithsonian and many other publications. As a journalist and press officer, he has reported from 30-some countries and all 50 U.S. states, often from remote locations including glaciers, tundra, tropical forests and high mountains. His 2001 book "Barren Lands" is the true account of how two 20th-prospectors discovered rich diamond deposits in Canada's far north.