Join Brent Breithaupt and Neffra Matthews of the Bureau of Land Management at the CU Museum of Natural History for a free lecture on Nov. 9 at 7 p.m. Learn how they helped pioneer the use of photogrammetry (stereo photography) to discover and document fossil footprints (especially dinosaur and pterosaur tracks) throughout the West. The large volume of tracks available for study yields an extensive data set that provides valuable insights into the activities of pterosaurs and allows for comparison with pterosaur tracks worldwide.