Working out what happened in the moments after the Big Bang is difficult. Scientists can come up with theories, but in the end they are useful only if they can be tested. Nobel prizewinner Robert Laughlin is passionate about experiments. He challenges the students in this film, as well as laureate David Gross, to come up with ways to test our big ideas about the universe. The two laureates make a bet. Watch the film to find out more and to decide who wins.
For more on the discussions at the Lindau Nobel Laureate Meeting 2012, please visit Nature Outlook's "Physics Masterclass" issue.
Click here to see all five films that Nature Video made on this year's Lindau Nobel Laureate meeting in Germany.