DOUG M BOYER/DUKE UNIVERSITY DEPARTMENT OF EVOLUTIONARY ANTHROPOLOGY(See K.A. Prufrock et al., “The first major primate extinction: An evaluation of paleoecological dynamics of North American stem primates using a homology free measure of tooth shape,” American Journal of Physical Anthropology, 2016.)
Image of the Day: Wiped Out
Carpolestes simpsoni, illustrated here, is thought to have lived in what's now Wyoming until its extinction around 56 million years ago.