Scientists have finally unravelled why scorpions glow bright green under ultraviolet light. The ability is widely known – but biologists have puzzled over why the creatures might have evolved it. Biologist Douglas Gaffin of the University of Oklahoma investigated the ‘fluorescence’ and found that the creatures can ‘sense’ light using their tails. The creatures may to have evolved the ability to help them scuttle away under rocks. The rest of the information is given in the link below.