This episode of the series that reveals your world with a bang has a royal wedding theme. Jem builds a singing road as a present for the royal couple. Dr Yan explains the science of dad dancing. And Liz uses DNA to track her family tree right back to the earliest humans.

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