Episode 9

Jem Stansfield puts spider silk - the strongest material in the natural world - to the test; Liz Bonnin joins the RAF's flight school to find out the truth about multi-tasking; Dr Yan Wong experiments with sodium acetate; and Dallas Campbell dusts off his top hat to reveal the secret science of magic.

The programme is co-produced with The Open University.

For more ways to put science to the test, go to the Hands-on Science area at www.bbc.co.uk/bang for details of the programme's free roadshow touring the UK and activities to try at home.