Before revision: A paleontologist at work at John Day Fossil beds National Monument Paleontology ( ), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including , the start of the Holocene epoch (roughly 11,700 years before present).
After revision: A paleontologist at work at John Day Fossil beds National Monument Paleontology ( ), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, sometimes mentions , the start of the Holocene epoch (roughly 11,700 years before present).