Maggie Aderin-Pocock reviews the astonishing footage returned from Mars by Nasa's Perseverance rover, and Chris Lintott reveals the incredible story behind the discovery of the Winchcombe Meteorite.
Chris and Maggie dive into the archives to discover how the hunt for extra-terrestrial life in the universe has been reported by the BBC over six decades.
A special 'Question Time' edition of the programme, recorded at the Civic Theatre, Chelmsford, as part of the British Science Association's annual science festival.
The team reveal how important it is to investigate our solar system's outer planets close up and why opportunities to do so only come around every so often.