Peppered moths originally evolved with pale wings and black speckles to blend into their surroundings and avoid predators.As with all plants and animals, occasionally a different-coloured one hatched, but black peppered moths rarely survived for long because they were caught so easily.By the mid-19th century, soot from the mills and furnaces of the Industrial Revolution coated trees and buildings.Gradually, more of the darker moths survived long enough to breed as they were now better disguised, and their paler cousins fell victim to predators.The gene for dark colouring became more widespread with each new generation of moths, and eventually it dominated.The trend has been seen in other species around the world, and is termed industrial melanism.But now the conditions which favoured the darker moths are a thing of the past, the balance appears to have tipped back againRead more: http://www.dailymail.co.uk/sciencetech/article-1194281/Darwins-evolution-moth-changes-black-white-thanks-soot-free-skies.html#ixzz3ZKQ9VL3v Follow us: @MailOnline on Twitter | DailyMail on Facebook
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