In an epic edition of the Space Boffins Podcast we ambitiously celebrate the 60th anniversary of Yuri Gagarin's flight and the 40th anniversary of the first flight of the Space Shuttle. Richard Hollingham and Sue Nelson are joined by live guests Stephen Walker author of Beyond, a new book on Gagarin, and Libby Jackson who leads the human space programme at the UK Space Agency. They also talk to two Space Shuttle astronauts: Sid Gutierrez about flying and commanding the Shuttle, and Kathy Sullivan, one of the first American women in space. She shares stories of the challenges of training for... Like this podcast? Please help us by supporting the Naked Scientists