As assistant
curator of the museum's Department of Vertebrate Paleontology, Granger was sufficiently free of administrative duties that for many years he could spend an average of five months a year in the field, mostly in the American West, as well as write two or three important papers each year. In 1921, he went to China and Mongolia as chief paleontologist of the museum's third expedition there. Under the direction of
Johan Gunnar Andersson, Granger helped open and begin excavating the site at
Zhoukoudian that yielded "
Peking Man" (
Homo erectus pekinensis). The initial discovery of a
hominid tooth at Zhoukoudian was made in 1921 by another paleontologist,
Otto Zdansky. Granger's work in China also took him to the
Three Gorges area of the
Yangtze River, but his five expeditions in 1922, 1923, 1925, 1927 and 1928 into the
Gobi Desert of Mongolia in association with the legendary
Roy Chapman Andrews led to Granger's most famous discoveries, including
Velociraptor,
Oviraptor and
Protoceratops, dinosaur finds that the public tended to associate with the more famous Andrews. Granger became Curator of Fossil Mammals at the museum in 1927 and also took the post of Curator of Paleontology in the museum's Department of Asiatic Exploration and Research. In 1935, he became president of the prestigious
Explorers Club. Although Granger was one of the foremost paleontologists of his time, he did not receive a formal academic degree until 1932 when
Middlebury College in Vermont awarded him an honorary
doctorate. ==Personal life==