Eric WegrynEric Wegryn is a life-long explorer and explainer. His career began as an aerospace engineer who helped launch NASA's Space Shuttles. Eric transitioned to science, earning a Ph.D. in planetary science from the University of Arizona (Lunar & PlanetaryLab), as part of the Mars Pathfinder mission. After Mars, he helped explore Saturn, discovering organic chemicals on Saturn's moons as member of the Cassini mission team at NASA Ames Research Center and the SETI Institute. Eric has taught astronomy, engineering, and physics courses at several colleges in the San Francisco Bay Area. He has traveled the world chasing solar eclipses and investigating nuclear sites including Hiroshima and Chernobyl. Eric has also authored Just Twelve Men, a history of the Moon landings, as well as a history of the Space Shuttle program. Read More Read Less