Clark then returned to Northern Rhodesia to serve once more as the Museum's director. In 1953, Clark ordered an excavation at Kalambo Falls, a 235m high, single-drop waterfall at the southeast end of Lake Tanganyika, on what is now the border between Zambia and Tanzania. The site would eventually emerge as one of the most important archaeological finds of the twentieth century, providing a record of more than two hundred and fifty thousand years of human history. To date, artifacts of Acheulean, Sangoan, Lupemban, Magosian, Wilton, and Bantu cultures have all been found at the falls. Clark also undertook significant fieldwork in Ethiopia, Somalia, Malawi, Angola, and Niger, some of which led him to collaborate with Louis and Mary Leakey.
In 1961, Clark became Professor of Anthropology (subsequently Emeritus) at the University of California, Berkeley, where he taught until his retirement in 1986. Under his guidance, the programme became one of the world's foremost in paleoanthropology. In 1965, he was elected a Fellow of the American Academy of Arts and Sciences. He received the Gold Medal Award for Distinguished Archaeological Achievement in 1988 from the Archaeological Institute of America. Clark continued working until his death, including a 1991 dig in China that was the first to be led in that country by foreign archaeologists in more than 40 years. Clark died of pneumonia in Oakland in 2002, having published more than twenty books and over 300 scholarly papers on paleoanthropology and African prehistory in the course of his career. His wife survived him by only two months. He is survived by his children, Elizabeth and John.
Members of Aboriginal, Torres Strait Islander and Maori communities are advised that this catalogue contains names and images of deceased people. All users of the catalogue should also be aware that certain words, terms or descriptions may be culturally sensitive and may be considered inappropriate today, but may have reflected the author's/creator's attitude or that of the period in which they were written.