Jem visits a mega-plant in Sussex to investigate the future of recycling. Dallas explains how GPS works and how it is changing our world, and Dr Yan uses science to crack the classic magic trick in which a table cloth is whipped from under a dinner service.
The programme is co-produced with the Open University. For more ways to put science to the test, go to www.bbc.co.uk/bang and follow the links to The Open University. Show less