This keyring depicts the skull of Paranthropus (or Austrolapithecus) boisei, which was discovered at Olduvai gorge by famed paleoanthropologist Mary Leakey in 1959. This species is nicknamed “nutcracker man” due to its powerful mandible. This Paranthropus boisei skull is hand carved and cast in genuine pewter. Great for the paleoanthropologist, paleontologist, or early hominin in your life! Dimensions (not including keyring): 3.2 cm long (including loop) X 2.2 cm wide X 2.4 cm tall Weight: 20.0 Grams