4/5 Brian Cox shows how a planet's size can make the difference between life and death. (R)
Ellie Harrison presents a bird's-eye view of the Gloucestershire countryside. (R)
A biography of the space shuttle, from triumphs to tragedies, using the BBC archive. (R)
2/23 Mark Horton learns how William the Conqueror taught the English how to construct castles. (R)
1/6 Are there real tomatoes in instant soup? And how much seawater is in sea salt?
BBC One Wales
Matt Baker celebrates the 70th anniversary of Enid Blyton's Famous Five in Dorset.
In Brazil, where people are using Twitter to help change the world's environment.
BBC News Channel
Guide to the latest gadgets, websites, games and computer industry news.
Saturday 30 June 2012