Scabbards were historically, albeit rarely, worn across the back with the intention of being quickly unsheathed, but only by a handful of Celtic tribes, and only with very short lengths of sword.<span>This is because it is almost impossible to draw any true two-handed sword and extraordinarily difficult to draw the majority of one-handed swords from a scabbard on the back.</span>
Sloths are xenarthrans – their closest relatives include anteaters and armadillos. And, among other things, large, curved claws and powerful forelimbs for digging are common xenarthran traits. It's likely that the last common ancestor of two- and three-toed sloths shared these features, too.
