If the phrase "I solemnly swear I'm up to no good" means anything to you, you'll be happy to know that scientists have come one step closer to a Potter-style "invisibility cloak" so you can use your Marauder's Map to the fullest. With the help of carbon nanotubes, researchers have been able to make objects seem to magically vanish by using the same principle that causes mirages. As anyone who's been especially parched along Route 66 knows, optical illusions occur when heat changes the air's temperature and density, something that forces light to "bend," making us see all sorts of crazy things. Apply the same theory under water using nanotubes -- one molecule carbon coils with super high heat conductivity -- and scientists can make a sheet of the stuff "disappear." Remember, it only works underwater, so get your gillyweed ready and check out the video after the break.

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Invisibility cloak made of carbon nanotubes uses 'mirage effect' to disappear