bioluminescence, or i'm getting eaten come help me, they make these bioluminescence calls that have the server meanings. jellyfish are very good at this. in 70s there trying to understand what makes bioluminescence happens and this one scientist was working on that question in jellyfish in puget sound, and yeah, interestingly he actually, he was about a few miles away from nagasaki when it was, bombed with the atomic bomb so he hera very interesting life story. anyway, he was able to purify the chemicals which are probably -- out of his jellyfish from puget sound, then what he notice was that purified the glow was blue, but the jellyfish in the ocean below green. so what was going on, and he went on to discover that there was a small protein called green fluorescent protein, which takes the blue light and ships it to the green wavelength. it's a very self-contained unit. it doesn't need an enzyme to work or anything. it just needs light. and it's a very sturdy. some biochemists and geneticists picked up on this and they would like we can take the dna for that green fluorescent protein a