I was a science nerd as a kid. Well, at least I had a real soft spot for charismatic megafauna, but who doesn’t? We had those cheap, plastic figurines of dinosaurs that we incongruously mixed with our mammoths and cavemen—wait, no. We weren’t allowed cavemen because people didn’t evolve. Nevertheless, we didn’t see any problem putting glyptotherium in combat with t-rex. Pleistocene or Triassic didn’t matter—they weren’t here now. Extinction is the great equalizer. One of the figurines that always intrigued me was the giant ground sloth. I mean, here was a creature bigger than it needed to be. Not hurting anybody, it just wanted to eat leaves and laze around. A lifestyle that sounds attractive to this day.
Photo credit: Postdlf, from Wikimedia Commons
Human beings, in a process that is still continuing, wiped out animals bigger than themselves. The story is poignantly told in footprints discovered in White Sands National Monument. A Washington Post piece by Ben Guarino tells how paleontologists discovered a human footprint embedded in that of a giant sloth. Reading the story I couldn’t help but wonder if this was the very last one in existence. What if we’d uncovered the story of extinction in real time? Sloths, apart from being named after a mortal sin, never harmed anybody unprovoked. Simple vegetarians—principally vegans, apart from the occasional accidental bug, actually—they were the ultimate victims of human greed. It is virtually certain that we drove them extinct just like we did the dodo and the fiscally conservative Republican. Not exactly fast food, sloths couldn’t really outrun us, and like good Trumpists, we took advantage of their weakness to our own gain.
Or loss. There are no giant sloths left. We’ll never thrill to the sight of a living eucladoceros, or wonder at chalicotheres roaming the savanna. We’ll never run for our lives from an African bear otter (the mind reels). Our world becomes poorer for our presence, it seems. We moved from huddling in fear in our caves out to take on the beasts with our technology. Once we cottoned onto the concept, we refined it until we could drop an elephant with the single pull of a trigger. Our destruction of megafauna continues at an alarming and accelerating rate. Evolution does have quite an imagination, after all. Like human beings, it can take sins and make them larger than life. And “thou shalt not kill,” we say, applies only to our species.
