Mr. Wm. Buckland (b. 1784), a British eccentric and paleontologist, was the first person to write a reasoned description of a prehistoric critter and its lifestyle, working from fossil remains. His efforts were enthusiastically received both publicly and scientifically.
He called his critter Megalosaurus, meaning Big Lizard. That was in 1824, for you who can recall it.
Were his findings conclusive? Not particularly, but he set a trend for exploration and investigation of the lives his discoveries led. Rhinos often think the same sense of wonder could be applied to our own relatives, the live ones as well as the extinct.