TED 2010 - Stephen Wolfram: Computing a theory of everything
Stephen Wolfram, creator of Mathematica, talks about his quest to make all knowledge computational -- able to be searched, processed and manipulated. His new search engine, Wolfram Alpha, has no lesser goal than to model and explain the physics underlying the universe.
The link address is: http://www.ted.com/talks/stephen_wolfram_computing_a_theory_of_everything.html