Spatiotemporal diversification of projectile point types in western North America over 13,000 years

North America was initially colonized by humans during the late Pleistocene, and over the course of the Holocene material culture diversified as local populations adapted to regional environments. However, to date, while anthropologists and archaeologists have long been interested in diversity, little is known of the process of diversification over space and time. Here, we focus on the diversification of the archaeological record of western...