В ролях
В роли: Self - Phd., Southwest Research Institute, San Antonio
В роли: Self - Phd., Royal Observatory Greenwich (как Mark Kukula)
В роли: Self - Phd., Southwest Research Institute, Boulder
В роли: Self - Phd., Southwest Research Institute, Boulder
В роли: Narrator
В роли: Self - Phd., Southwest Research Institute, Boulder
В роли: Self - Queen's University Belfast
