BBCnews is carrying this new article summarizing experimental proof that the 2nd law of thermodynamics is not, in fact, set in stone. At very, very, very small scales, it can and in fact does reverse itself. This has some unexpected implications for nanotechnology, since these results strongly imply that extremely tiny machines can run backward at random periods for no reason at all.

I'm going to go soak my head now. Quantum mechanics is f'd up.