Ursula Moser Cowgill (9 November 1927 – November 27, 2015)[1][2] was a biologist and anthropologist who worked for Yale University, Dow Chemical Company and the University of Colorado during the second half of the 20th century. Her work includes studies of agricultural practices in pre-Columbian Mesoamerica, seasons of birth in human beings, the relationship between cultural gender bias and infant mortality, and the possible role of selenium in reducing mortality from AIDS. She also looked after four pottos for many years and published a series of observations on their behaviour.[3]