Swimming is supposed to give you a healthy glow, but these swimmers weren't quite sure what was going on when they took a late-night dip and turned a fluorescent shade of blue. 'It was like we were playing with radioactive paint,' said photographer Phil Hart who snapped the bizarre sight as his friends emerged from a lake in the dark of night. The light is created by a chemical reaction called bioluminescence, which happens when a naturally-occuring micro-organism in the water is disturbed.
interesting. Do they know the chemical compounds that cause the reaction? bioluminescence sounds a bit off on it. There has to be something else too