At the time of his death in 1977, he was Benjamin Franklin Professor of Anthropology and History of Science, and the curator of the Early Man section at the University of Pennsylvania Museum. He had received thirty-six honorary degrees over a period of twenty years, and was the most honored member of the University of Pennsylvania since Benjamin Franklin. In 1976 he won the Bradford Washburn Award of the Boston Museum of Science for his "outstanding contribution to the public understanding of science" and the Joseph Wood Krutch Medal from the Humane Society of the United States for his "significant contribution for the improvement of life and the environment in this country."