Dr. Jim Bell is a professor of geology and planetary science in Arizona State University's School of Earth and Space Exploration in Tempe, AZ, and an adjunct professor in the Department of Astronomy at Cornell University in Ithaca, NY. Jim is a member of the American Geophysical Union and the Geological Society of America.

As President of The Planetary Society, he is a prolific public commentator on science and space exploration, earning the 2011 Carl Sagan Medal from the American Astronomical Society for excellence in public communication of planetary science.

Michael Webb is a Los Angeles–based writer who has authored more than twenty books on architecture and design, most recently Modernist Paradise: Niemeyer House, Boyd Collection, and Venice, CA: Art + Architecture in a Maverick Community, while contributing essays to many more.

He is also a regular contributor to leading journals in the United States and Europe. Growing up in London, he wrote for The Times and Country Life before moving to the US to direct film programs for the American Film Institute and curate a Smithsonian exhibition, Hollywood: Legend and Reality, which traveled to major American cities and Tokyo.