If you have ever read about our ancestors, you were probably taught that, at the end of the last Ice Age, the citizens of North America hunted the many species of megafauna (giant mammals) to extinction. After all, why not assume terrible humans are responsible for all that death?
As it turns out, evidence has been growing of a planet-altering catastrophe as the cause. Most likely an impact event centered over North America (which endured most of the extinctions), with indications of impact craters littered across the East Coast.
Why is this so fascinating? Because it reminded me of the tendency of some people to immediately blame humans for every terrible event to befall the planet. These are the same people, with their dour and glum outlook, whom have been predicting for decades, that we only have a decade or two before we destroy the planet, run out of energy, and starve to death.
Then the decades pass, and the apocalyptic scenarios do not. Continue reading