In 2008-9, a 14-in. natural gas liquids pipeline was constructed in Colorado and Wyoming. Alpine Archaeological Consultants, Inc. was hired to survey the route; the major research themes presented here synthesize chronometric and spatial information, subsistence, prehistoric technology, small cultural features, and prehistoric architecture.

First published in 1998. Did prehistoric humans walk to North America from Siberia? Who were the inhabitants of the spectacular Anasazi cliff dwellings in the Southwest and why did they disappear? Native Americans used acorns as a major food source, but how did they get rid of the tannic acid which is toxic to humans? How does radiocarbon dating work and how accurate is it? Written for the informed lay person, college-level student, and professional, Archaeology of Prehistoric Native America: An Encyclopedia is an important resource for the study of the earliest North Americans; including facts, theories, descriptions, and speculations on the ancient nomads and hunter-gathers that populated continental North America.

Using Science to Improve the BLM Wild Horse and Burro Program: A Way Forward reviews the science that underpins the Bureau of Land Management's oversight of free-ranging horses and burros on federal public lands in the western United States, concluding that constructive changes could be implemented. The Wild Horse and Burro Program has not used scientifically rigorous methods to estimate the population sizes of horses and burros, to model the effects of management actions on the animals, or to assess the availability and use of forage on rangelands. Evidence suggests that horse populations are growing by 15 to 20 percent each year, a level that is unsustainable for maintaining healthy horse populations as well as healthy ecosystems. Promising fertility-control methods are available to help limit this population growth, however. In addition, science-based methods exist for improving population estimates, predicting the effects of management practices in order to maintain genetically diverse, healthy populations, and estimating the productivity of rangelands. Greater transparency in how science-based methods are used to inform management decisions may help increase public confidence in the Wild Horse and Burro Program.