It seems back in the day our early Jordanian cousins (these folks weren't Homo sapiens - maybe H. neanderthalensis? Erectus? Rhodesiensis?) liked them some meats. We're talking horses, cows, ducks...and rhinos.
Dr. April Nowell, who leads the team, can't yet explain how the protos brought down a rhino using only weapons like this:
Much respect, my prehistoric brothers.