Glad You Asked |
Self - Planetary Scientist, NASA |
2019 |
Space's Deepest Secrets |
Self - Astrobiologist / Self - Phd., Senior Planetary Scientist, NASA / Self - Planetary Scientist, NASA |
2016 |
The Visit |
Self - Astrobiologist, National Aeronautics and Space Administration (NASA) |
2015 |
Xploration Outer Space |
Self - NASA Senior Scientist |
2014 |
Secrets of the Earth |
Self - NASA Astrobiologist |
2013 |
Aliens: Are We Alone? |
Self |
2013 |
Aliens: The Definitive Guide |
Self - Astrobiologist, NASA Ames Research Center |
2013 |
NASA's Unexplained Files |
Self - Planetary Scientist / Self - Phd., NASA Astrobiologist / Self - Planetary Scientist, NASA Ames Research Center / Self - Planetary Scientist , NASA Ames Research Ctr. / Self - Astronomer |
2012 |
How the Universe Works |
Self - Astrobiologist |
2010 |
Mars: Making the New Earth |
Self - Astrobiologist, NASA Ames |
2009 |
Naica: Secrets of the Crystal Cave |
Self |
2008 |
Mars Rising |
Self |
2007 |
The Mars Underground |
Self |
2007 |
The Universe |
Self - NASA Ames Research Center / Self - Astrobiologist / Self - Astrobiologist, NASA Ames Research Center / Self - NASA / Ames Research Center |
2007 |
Is It Real? |
Self - Planetary Scientist, NASA Ames |
2005 |
Peter Jennings Reporting: UFOs - Seeing Is Believing |
Self - Planetary Scientist |
2005 |
Naked Science |
Self - NASA / Self - Astrogeophysicist |
2004 |
The Planets |
Self - NASA AMES Research Centre / Self - NASA Ames Research Center |
1999 |
History's Mysteries |
Self |
1998 |
Cosmic Travelers: Comets and Asteroids |
Self |
1997 |
Nova |
Self - Astrobiologist at Ames Research Center / Self - Participant / Self |
1974 |
Horizon |
Self - Space Science Division, NASA / Self - NASA Ames |
1964 |