[4][5][1]: 32 Sternberg later collected fossils for Cope's rival in the Bone Wars, Othniel C. Marsh, working alongside John Bell Hatcher in Long Island, Kansas.

[1]: 31–32  Sternberg also collected for various museums and institutions, and his work took him all over North America, including locations in California, Montana, Texas, and Canada.

They became famous for their collecting abilities and many discoveries, including the "Trachodon mummy", an exquisitely preserved specimen of Edmontosaurus annectens (see hadrosaurid).

He wrote devotional poetry and published a collection of poems called A Story of the Past: Or, the Romance of Science (1911).

[9][10] In his old age, he would visit the American Museum of Natural History to view his finds, and one visit to the "Trachodon mummy" inspired the following quote: My own body will crumble in dust, my soul return to the God who gave it, but the works of His hands, those animals of other days, will give joy and pleasure to generations yet unborn.Fossils collected by Charles Sternberg, including dinosaurs from the western United States and Canada, are in museums around the world.