Darwin's theory of evolution, published in 1859, shook up the field of paleontology, the study of ancient plants and animals. Othniel Charles Marsh and Edward Drinker Cope, enthralled with these new ideas, discoveries, and developments, became determined to become world-famous paleontologists. When they met in 1863, they started off as friends. But within a few years, competition drove them apart. Each fought bitterly to discover more fossils, name...