Musician Mark Everett, frontman of the band Eels, talks about his father Hugh Everett III.

The physicist's pioneering work on quantum theory in the 1950s was completely dismissed during his lifetime, but has achieved posthumous recognition. Professor Stephen Hawking cites Everett's work as having contributed to our understanding of the universe.

Mark Everett speaks to Newsnight's Science editor Susan Watts.

Read Susan Watts' blog: Are we closer to a 'theory of everything'?

Watch the Newsnight film featuring interviews with Professor Stephen Hawking and Mark Everett on Wednesday 8 September 2010 at 2230 BST on BBC Two, then afterwards on the BBC iPlayer and Newsnight website.