Fifty years will do nicely.
Talk about a quick learner: in just 50 years, a fish has evolved a resistance to toxic chemicals polluting its Hudson River home, a new study finds.
Speciation is not the whole of evolution, but a subset of it (and human speciation a subset of that), a point the Michelle Bachmann’s of this world find difficult to grasp.
Update: Wired picked up on this story, with a very good explanation of the genetic adaptations. Mutant Fish Safely Store Toxins in Fat. Strangely, Wired makes no mention of Michelle Bachmann.