The physics can be modeled, but according to this article (http://techglimpse.com/index.php/ibms-blue-gene-exploring-protein-folding-mystery.php http://techglim

The physics can be modeled, but according to this article (http://techglimpse.com/index.php/ibms-blue-gene-exploring-protein-folding-mystery.php http://techglimpse.com/index.php/ibms-blue-gene-exploring-pr...) a 1 petaflops machine is estimated to take 3 years to crunch through 100 microseconds of simulated time. And that's just for a single protein interacting with itself and a bit of water.