Making Light: The tastemakers of tomorrow ::: January 07, 2010, 04:22 PM Kid Bitzer@15: the way that bubbles naturally solve surface-minimization problems I feel compelled to mention that bubble films only give you a local minimum, which is not all that hard on a computer. Finding a global minimum is NP-hard, and bubbles don't help. The distinction is often blurred in popular speculative math of the sort one shouldn't cite.