During the 1990s, Gell-Mann's interest turned to the emerging study of complexity. He played a central role in the founding of the Santa Fe Institute, where he continues to work as a Distinguished Professor. He wrote a popular science book about these matters, The Quark and the Jaguar: Adventures in the Simple and the Complex. The title of the book is taken from a line of a poem by Arthur Sze: "The world of the quark has everything to do with a jaguar circling in the night." Gell-Mann also is an avid birdwatcher, a collector of antiquities, rancher [2], and a keen linguist. Along with S.A. Starostin, he established the Evolution of Human Languages project at the Santa Fe Institute. The author George Johnson has written a biography of Gell-Mann, which is titled Strange Beauty: Murray Gell-Mann, and the Revolution in 20th-Century Physics, which Dr. Gell-Mann has criticized as inaccurate.