Soon you could be swapping your mobile phone for a molar phone. Royal College of Art students in London have developed a phone that fits inside a tooth. The concept device picks up signals with a radio receiver and uses a tiny vibrating plate to convey them as sound along the jawbone to a person's ear. The designers said the mini-molar phone could be implanted in a tooth during routine dental surgery. The prototype phone is the work of graduates James Auger and Jimmy Loizeau and forms part of the Royal College of Art's annual summer exhibition. Known as The...