George Steinmetz is known for his ambitious photographic projects for National Geographic, the New York Times, the National Science Foundation, and other leading journalistic and scientiﬁc institutions. His books for Abrams include New York Air (2015), Desert Air (2012), Empty Quarter (2009), and African Air (2008). He lives in New Jersey. Andrew Revkin has won most of the top awards in science journalism over a three-decades-long career including 21 years at the New York Times. He lives in New York’s Hudson River Valley.