Ellen Stofan is a planetary geologist who has conducted research on
the geology of volcanic and tectonic features on Venus, Mars,
Titan, and Earth. While an employee of NASA's Jet propulsion
Laboratory (JPL) she was the Chief Scientiston NASA's New
Millennium Program and the Deputy Project Scientist on the Magellan
Mission to Venus. She is currently a Senior Research Scientist of
Proxemy Research and an Honorary Professor of Earth Sciences at
University College London. She lives with her husband and three
children on a farm in Virginia.
Tom Jones is a scientist, author, pilot, and former NASA astronaut.
He flew on four space shuttle missions and led three space walks to
install the centerpiece of the International Space Station. He is
the author of Sky Walking- An Astronaut's Memoir (Harper Collins,
2006) and the Complete Idiots Guide to NASA (Alpha, 2002) as well
as a contributing writer to Smithsonian Air and Space magazine. He
lives in the Viginia suburbs of Washington, D.C.
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