On page E26 of the January 24, 2007 edition of the Hamodia, in the middle column of an article titled "Bright White Beetle Dazzles Scientists", the newspaper states, "In 2005, Dr. Pete Vukusic of the University of Exeter showed how butterflies give out fluorescent signals by absorbing and re-emitting unltra-violet light. This technology has been in place in natue for 30 million years, but scientists are just now developing high emission light emitting diodes (LEDs), which work in the same way...

Hmmm....