3-D Model of Projectile Point (video) Smithsonian Share Print E-Mail Loading video... Caption A 360-degree video of a three-dimensionally modeled Clovis projectile point from the Smithsonian's National Museum of Natural History research collections. Scientists analyzed and compared three-dimensional models like this one from the Smithsonian and other museum collections to identify how and when early Americans' technology became regionally distinct 12,500 years ago. These regional differences signal cultural diversification and adaptation, suggesting that groups of early Americans may have changed the way they were social interacting at this time. Credit Sabrina Sholts, Smithsonian. Usage Restrictions News-media use of the these graphics in relation to this study is permitted. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.