William King Gregory, American zoologist and anatomist (born 1876)

William King Gregory was an American zoologist, primatologist, paleontologist, and functional and comparative anatomist. He was an expert on mammalian dentition, and a contributor to theories of evolution. He presented his ideas to students and the general public through books and museum exhibits.

December 29 is the 363rd day of the year in the Gregorian calendar; two days remain until the end of the year.