The Carboniferous Period was a time in prehistory when nature decided, “Hey, you know what would be cool? Hear me out: Really big insects!” And among these titanic terrors was—duly appointed through prehistoric democratic election—the chief nightmare overlord of the forest floor: Arthropleura. How big was Arthropleura? Longer than a human and able to rear up and see the tears welling up in your eyes. Like it matters at this point, but experts claim that Arthropleura was a herbivore. As true as that may be, an Arthropleura within the confines of Jurassic Park would surely have a taste for humans that can’t run fast enough.