One early winter evening in 1824, English naturalist and theologian William Buckland rose to address the Geological Society of London. Anticipation filled the room. Buckland was known for his energetic lectures at the University of Oxford, where he would buzz around in full academic regalia, passing around severed animal parts and fossils to his adoring students. For years there had been rumors that Buckland had gotten his hands on some giant fossil bones, found by workers quarrying roofing stone in the English countryside. After nearly a decade of study he was finally ready to make an announcement. He told the audience that these bones had belonged to an ancient lizardlike animal much larger than any modern lizard. He called it Megalosaurus. The crowd was enraptured. Buckland had just unveiled the very first dinosaur.