BBC One's science magazine show returns to put more science and technology to the test.

In this episode, the team investigate the recent Gulf of Mexico oil disaster. Zoologist Liz Bonnin travels to Louisiana and takes part in the rescue effort to protect the area's wildlife, while Jem Stansfield builds a scale model to explain what happens when an oil well gets out of control, and how to solve the problem.

Meanwhile, Dallas Campbell proves Einstein's theory of relativity with the help of a jet plane and a very expensive atomic clock.

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