The Peking Man Site was first discovered by Johan Gunnar Andersson in 1921, and was first excavated by Otto Zdansky in 1921 and 1923, unearthing two human teeth. These were later identified by Davidson Black as belonging to a previously unknown species, and extensive excavations followed. Fissures in the limestone-containing middle Pleistocene deposits have yielded the remains of about 45 individuals, as well as animal remains, and stone flake and chopping tools.
