image: Composite cast showing a range of footprints from the White Sands National Monument (WHSA) field site. This material relates to a paper that appeared in the 25 April 2018, issue of Science Advances, published by AAAS. The paper, by D. Bustos at White Sands National Monument in Holloman Air Force Base, NM, and colleagues was titled, "Footprints preserve terminal Pleistocene hunt? Human-sloth interactions in North America." view more
Credit: [Credit: David Bustos, National Park Service]