Gabriel Popkin ("Right Fish, Wrong Pond"), A&S '13 (MA), is a science writer in the Washington, D.C., area and a recent graduate of the science writing program at Johns Hopkins. He has written for publications including National Geographic News, ScienceNOW, and Johns Hopkins' Arts & Sciences magazine.

Marianne Amoss ("Treating the Trauma of Intensive Care"; "Welcome to the District"; "Thrill of a Challenge"; and "Space Communicator") is the former managing editor of Urbanite magazine. Her writing has also appeared in the Baltimore Sun, Baltimore City Paper, Baltimore Fishbowl, and Style magazine.

Walter Vasconcelos ("Bang On," illustrations) is an illustrator and designer whose work has appeared in newspapers and magazines in Brazil, the United States, and several other countries. He lives and works in Rio de Janiero.

Annie Tritt ("A Guide for Getting Lost," photography) is a born-and-raised New Yorker who now splits her time between San Francisco and Los Angeles. Her photographs have appeared in publications such as the New York Times, Wired, San Francisco Magazine, and Der Spiegel, among others.

Geoffrey Himes ("Creating a Scene") has written about music for the Washington Post since 1977. His work has also appeared in Rolling Stone, the New York Times, DownBeat, Paste, Nashville Scene, Baltimore City Paper, Baltimore magazine, and many more. He hosts the monthly Roots Cafe Singer-Songwriter Series at Baltimore's An Die Musik.

Lauren Simkin Berke ("Right Fish, Wrong Pond," illustrations) is a Brooklyn-based artist and illustrator whose clients include the New York Times, the Los Angeles Times, the Boston Globe, New York Magazine, the Washington Post, and others.

On the cover

Marshall Clarke, an independent photographer based in the Baltimore-Washington, D.C., area, photographed the babies that appear in our cover story on child development research. The colorful pom-poms in the cover photo are those used in the Laboratory for Child Development's algebra study, which found that children as young as 1 year old are capable of doing algebra. Clarke's work has appeared in exhibitions at the Fraser Gallery in Washington, D.C., and at the Baltimore Museum of Art, and his clients include magazines, universities, multinational corporations, and nonprofits.