An experienced certified public accountant, Silford Warren leads as the president of his own accounting firm in New York City, where he provides various financial and tax-related services. Silford Warren balances his professional pursuits with a number of other interests, including the study of human history and anthropology.
According to research recently published in the journal Science, the discovery of a jawbone in Ethiopia has extended human history by roughly 400,000 years and suggests that early members of the Homo species resided in Ethiopia around 2.8 million years ago. The fossil was discovered at the Ledi-Geraru research site by Chalachew Seyoum, an Arizona State University graduate student from Ethiopia, and the subsequent research was led by Brian Villmoare, a scholar at the University of Nevada, Las Vegas.
Due to its placement in the fossil record, the jawbone helps explain the evolution of hominids between the time frame of 2 million and 3 million years ago, a period that previously was poorly understood because of a lack of fossils. The anatomical characteristics of the jawbone are a blend of primitive and more advanced features, including human-shaped teeth and a backward-sloped chin similar to that of an ape.