The first thing I notice. You linked to wikipedia.
Great site, I use it all the time. But how many times have you heard, You must be extremely carefull about placeing too much faith in anything you read there.

Anyway
First few lines I see are full of "likelies" and "suspecteds" and "highly controversials".
I see lots of hand drawings of various animals.
I see illustrations of backfeet becomming smaller and smaller.
I see nothing more than I have seen a thousand times before.
Come to think of it, judging by all the previously visited links I see, I HAVE seen it a thousand times before.

Were is the "real evidence" this is nothing more than people presenting their imaginative naration and artistic skill.
There might be something in some of it but how can you tell what is real and what is not? How is this observable evidence? How is this digging into solid reliable facts?

Come on now, we are in a game engine forum. We do that sort of thing to our models all the time.