Sixty-six million years ago, so the scientists tell us, an asteroid slammed into this planet. Landing on what’s now Mexico’s Yucatán Peninsula, it gouged out a crater 150 kilometers wide and put so much soot and sulfur into the atmosphere that it created what was essentially a prolonged “nuclear winter.” During that time, among so many other species, large and small, the dinosaurs went down for the count. (Don’t, however, tell that to your local chicken, the closest living relative — it’s now believed — of Tyrannosaurus Rex.)
It took approximately 66 million years for humanity to evolve from lowly surviving mammals and, over the course of a recent century or two, teach itself how to replicate the remarkable destructive power of that long-gone asteroid in two different ways: via nuclear power and the burning of fossil fuels. And if that isn’t an accomplishment for the species that likes to bill itself as the most intelligent ever to inhabit this planet, what is?