William Hartmann
Elenco
William Hartmann é conhecido pelo seu trabalho em Cosmic Collisions (2009), Future Flight (1987) e UFOs: The Secret History (2010).
Elenco
- 2010Como Funciona o UniversoSelf - Planetary Scientist
- 2010UFOs: The Secret HistorySelf
- 2010UFOs: The Secret History Part 2 - The Extraterrestrial HypothesisAstronomer, Artist; University of Arizona
- 2009How the Earth Was MadeSelf - Planetary Scientist, Planetary Science Institute, Arizona
- 2008CatastropheSelf
- 2007O UniversoSelf - Planetary Science Center
- 1999If We Had No MoonSelf
- 1999The PlanetsSelf - Planetary Science Institute, Arizona
- 1964HorizonSelf