Ice Age Fossils State Park is now open. Officially announced in January of 2017 as part of Governor Brian Sandovalโs โExplore Your Nevada Initiativeโ, this 315 acre park features a portion of the upper Las Vegas wash that is rich in both paleontological and historical resources. During the Pleistocene, also known as the Ice Age, the wash provided verdant habitat for several species of now extinct mammals, including Columbian mammoths, American lions, camels, dire wolves, and ground sloths. The discovery of abundant fossils onsite triggered a long history of scientific research, which includes the famous โBig Digโ of 1962-3, the largest inter-disciplinary scientific expedition of its kind up to that point.