Inspirational Radioactive Wolves

When I think of unspoiled wilderness, I often mentally refer to the Chronicles of Narnia. This children's book series so beautifully illustrates a world before human influence and destruction. A simpler, greener time, when the animals roamed free and the land was pure.
From my understanding, many ruined ancient civilizations across the globe are the result of ecosystem destruction, followed by fleeing of the destroyers (i.e. homo sapiens) and a gradual return of the land to its natural state.
Alas, us silly humans are at it again: this time the destruction was nuclear (i.e. Chernobyl), the people left, and surprise! the wilderness returned...
What joy to watch the "radioactive wolves" story on PBS, as the Canis Lupus flourish and howl atop abandoned buildings within the hot zone. The Russian scientists seem a bit perplexed at this new nature preserve and study it closely. They even shipped bison to the area as the animals seem to do well there. The observable birth defect rate amongst these animals, although increased, was in fact lower that one would assume (no, this is not pure Narnia after all) but nevertheless, it's the best today's wildlife can hope for.
Of course the question proposed by all this is: how come this low level radiation affects the animals minimally? I believe the answer lies in the November Discover magazine. Sperm. Humans with their humanity (or is it perversion??) allow everyone to mate. Weak, tall, small, smart, dumb, old-- you name it--we'll allow it. Thus the genetic material sent forth in our sperm is becoming increasingly weaker. Nevertheless, the "cruel" (wiser?) animal world, only allows the strongest to mate. The alpha wolves have the babies, and everyone else in the pack is assigned babysitting duties only!
Of course this is only my theory, and only time will tell if the birth defects increase as the animals continue to reproduce in this radiated area. But in the meantime--I finally have hope, that the animals will prevail and outsmart us after all.