In 1877, at the elevation of the dinosaur bone craze, a fossil collection agency discovered a partial vertebra in a Colorado quarry. The bone remained in extremely poor condition, however it was remarkably large; its approximate height was in the area of five feet. An enormous thigh – the huge bone of the top leg – was located in close proximity to the vertebra, and likely came from the exact same animal, yet was not provided to Cope. He guessed that the A fragillimus had a 12-foot tall thigh, making it the biggest dinosaur ever yet found. Part of the reason is since nobody knows where the vertebra or thigh bones are; they were shed shortly after Cope released his findings, and also have actually never ever been recouped. Paleontologist Ken Woodworker observed that the bone might have simply crumbled right into dust after an extremely brief exam. In 1994, researchers tried to find the Colorado quarry, but the land was so worn down that the rest of the skeleton is most likely long gone. Besides, he was the only researcher to really see the bone; all various other estimates and also verdicts have come from his notes and sketches. At the time of exploration, Cope was involved in an intense competition with another paleontologist, Marsh; their ferocious connection, dubbed the Bone Battles, was full of allegations and treason. Yet Marsh never doubted the A fragillimus paper; the searchings for were likewise believed to be real by various other scientists of the time.