DAVID C. CATLING

David C. Catling is a professor in Earth and space sciences at the University of Washington, studying planetary surfaces, atmospheres, and habitability. He actively participates in the research of NASA's Astrobiology Institute and is the author of Astrobiology: A Very Short Introduction. He has taught courses in planetary atmospheres, planetary geology, astrobiology, and global environmental change at undergraduate and graduate levels. He was also an investigator for NASA's Phoenix Mars Lander, which successfully operated in the arctic of Mars during 2008. Grover Gardner (a.k.a. Tom Parker) is an award-winning narrator with over a thousand titles to his credit. Named one of the "Best Voices of the Century" and a Golden Voice by AudioFile magazine, he has won three prestigious Audie Awards, was chosen Narrator of the Year for 2005 by Publishers Weekly, and has earned more than thirty Earphones Awards.