Free Energy is a Myth
Designs for perpetual motion machines have cropped up pretty regularly for hundreds of years. The thing is, it's impossible to get more energy out then you put in. In fact, it's almost impossible to get out the same as you put in. It's a shame, because powering the entire world without generating a single atom of pollution would be, well, quite handy.
An Irish company called Steorn has been claiming for a while that they have cracked it with their Orbo device. This quote from their website makes some bold claims, "Orbo produces free, clean and constant energy - that is our claim. By free we mean that the energy produced is done so without recourse to external source. By clean we mean that during operation the technology produces no emissions. By constant we mean that with the exception of mechanical failure the technology will continue to operate indefinitely."The company was so confident that their machine was the real deal, that they organized a demonstration in the Kinetica Musuem in London. However, there was a problem. Apparently the machine doesn't work well under bright camera lights. This has led some at TreeHugger to suggest that the device must be susceptible to a new version of the uncertainty principle - it only works if the press isn't watching.
Sean McCarthy CEO stated that "technical problems arose during the installation of the demonstration unit in the display case on Wednesday evening. These problems were primarily due to excessive heat from the lighting in the main display area. Attempts to replace those parts affected by the heat led to further failures and as a result we have to postpone the public demonstration until a future date."