Among the most frequently repeated so-called "proofs" of the theory of evolution in the world is that of the moth population in Great Britain during the Industrial Revolution in the 19th century. According to this claim, air population darkened the colour of tree bark, which meant that since dark coloured moths had better camouflage they were protected from bird predators, as a result of which the dark coloured moth population increased. Yet this is not evolution, because no new species of mothsemerged. All that happened was the population levels of previously existing species changed. Moreover, recent works on the story show that the story itself was not true at all; the famous pictures of moths resting on trees were fake and no such "industrial mellanism" (darkening of colour due to industrial pollution) ever took place. (see The True Story of Industrial Melanism)