I read somewhere this week that a hippopotamus is more closely related to a pig than to a horse, which isn't electrifying news or surprising.

However, and more to the point, in reading over this thread and coming to Paulb's "Mud, mud, glorious mud" post above, I thought of a hippopotamud, which sounds like a hippodrome-sized pot of mud, say, one for the convivial pleasure of mud bathing with the thousands.

And what is the name of that now extinct cow in the cave drawings==the auroch something or other?