Gravity | Laura Mersini-Houghton, Erik Verlinde, Frank Wilczek

We all think we know what gravity is. But where gravity comes from stumped Newton, and 300 years later we are no closer to an explanation. We don't even have a mathematical account of gravity that applies in all situations. Why is a force so central to the universe so elusive in its character? Theoretical physicist Laura Mersini Houghton, Nobel Prize-winner Frank Wilczek and string theorist Eric Verlinde examine the enigma of gravity.