- guardian.co.uk, Monday 21 February 2011 00.12 GMT
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We never get bored of speaking to people who have been into space. As the shuttles prepare for their final lift-offs, we ask former Nasa astronaut Jeff Hoffman whether they would have been scrapped if Challenger and Columbia were still flying.
Jeff has just presented a documentary on the BBC World Service, The Last Chance to Fly the Space Shuttle.
If like us you love hearing tales from people who have been into space, listen to our interview with Jeff in full in the latest Science Weekly Extra podcast. It should automatically download to this podcast feed.
And to finish this show, a song ... about yeast ... the sex life of yeast actually. Artist Gethan Dick teamed up with six biomedical students from University College London to make songs about their research. The album's called Trying and Trying and Trying.
WARNING: this music contains strong language.
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