I read about a science experiment in 'Mutants' by Armand Marie Leroi (which I would recommend to anyone that has an interest in nature's wonderful errors) that I couldn't help but draw. In order to recognise the job of a certain acid within the early embryogenesis stages, the acid was isolated and dabbed onto the recently amputated limb buds of a tadpole. The poor tadpole then began sprouting bouquets of extra arms, legs, tails and possibly heads, but I definitely made that bit up in the drawing. So then the scientists knew that it was that powerful acid that was the driving force behind growth.
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