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The light bulb needs changing.\xa0Edison\u2019s incandescent bulb, virtually unaltered for more than a century, is now being eclipsed by the LED.\xa0The creative applications for these small and efficient devices are endless: on tape, on wallpaper, even in contact lenses.\xa0They will set the world aglow.\xa0But is a brighter world a better one?\nDiscover the many ingenious applications for LEDs and the brilliance of the 19th century scientist, James Clerk Maxwell, who first discovered just what light is.\xa0But both biologists and astronomers are alarmed by the disappearance of dark.\xa0\xa0Find out how light pollution is making us and other animals sick and \u2013 when was the last time you saw a starry night?\n Guests:\n\u2022\xa0Ian Ferguson \u2013 Engineer, dean of the College of Engineering and Computing, Missouri University of Science and Technology\n\u2022\xa0Jay Neitz \u2013 Professor, department of ophthalmology, University of Washington\n\u2022\xa0Martin Hendry - Professor, gravitational astrophysics and cosmology, University of Glasgow\n\u2022\xa0John Barentine \xa0- Program manager, International Dark Sky Association\xa0\nLearn more about your ad choices. Visit megaphone.fm/adchoices