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Remember how hands-free kits for mobile phones were meant to reduce the radiation going into your brain, but were then discovered to be just as dangerous as holding the phone to your ear, if not more so?
Drs James Luck and Ata Khalid have come up with a solution which is definitely from the "Now why didn't I think of that?" department. For some reason I have more admiration for inventions which are rather obvious, but which nobody else considered. They show greater lateral thinking on the part of the inventors. Perhaps I find Edison's famous statement about genius being 1% inpiration and 99% perspiration a little depressing, so I feel cheerier when an invention appears which helps to redress the balance!