I just thought this was so cool. This guy apparently took some firefly statistics of when fireflies light up and how many times and made his own jar of fireflies. He explains how he did it on his little blog. I think this is really neat. I always felt bad when I was little put lightning bugs in my room because they always died, now you can have the same effect without the mortality rate. You can watch the video here: http://www.youtube.com/watch?v=UeL0LC2IgpQ&eurl=
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