Filmografia
| 2020 | Venus: Death of a Planet · as Self |
| 2010 | Weird or What? · as Self - AstrobiologistNa Plex |
| 2007 | The Universe · as Self - Denver Museum Of Nature & Science |
| 2004 | Naked Science · as Self - Curator Of Astrobiology |
| 1999 | The Planets · as Self - University Of Colorado |
| 2015 | Chasing Pluto · as Consulting Producer |
| 1974 | NOVA · as Consulting Producer |
| 1998 | Life Beyond Earth · as Cast |