One of the most important principles of physics, that disorder, or entropy, always increases, has been shown to be untrue.

"Scientists at the Australian National University (ANU) have carried out an experiment involving lasers and microscopic beads that disobeys the so-called Second Law of Thermodynamics, something many scientists had considered impossible."

] Essentially, the smaller a machine is, the greater the
] chance that it will run backwards. It could be extremely
] difficult to control.
]
] The researchers said: "This result has profound
] consequences for any chemical or physical process that
] occurs over short times and in small regions."

well, that would make things tougher, yes...