Exactly like nothing we've ever seen

Undiscovered animal, alien, or a hoax? How about none of the above?



Again with the suspension of ignorance. We don't know what any aliens look like. So to say that this looks like an alien requires that alien be shorthand for what we have imagined or previously suggested that some aliens look like. And undiscovered of course means previously undiscovered. Both of those abbreviations are reasonable and common in conversation.

But it's quite a stretch to say that a hairless sloth is the most bizarre discovery.