natural selection comic
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a long time ago there were light and dark butterflies that hid on light and dark trees from their predators but one day...
they made factories to make things faster that was powered by coal..
the coal got on trees and coated them causing them to turn darker
the darker butterflies thrived but the lighter butterflies didn't blend as well into the trees so they started to die off
the lighter population started to decrease and the more darker population increased
as the years went by the dark butterflies had offspring with other darker butterflies making it that lighter butterflies were very rare.
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