3/6 Greg finds out if winning unfair fights only happens in films and why the sky is blue. (R)
4/6 Greg finds out if you can escape when you're buried alive and why a boomerang comes back. (R)
1/10 Devastating floods in the village of Boscastle leave one woman fearing for her son's life. (R)
1/8 Exploring the science of fuel - why petrol costs so much, how an oil rig works and more.
BBC One except Northern Ireland, Wales
BBC Two Northern Ireland, Wales only
4/6 Upgrading the tube is not easy, with both new trains and new signals causing problems.
Tuesday 13 March 2012