Organic remains, especially dung, of extinct ground sloths provide ideal material for
radiocarbon dating. Rampart Cave, Arizona, revealed periodic occupation at intervals by the …

Detailed examination of fossil dung of the Shasta ground sloth (Nothrotheriops) from
Rampart Cave, Arizona, revealed periodic occupation from more than 40,000 yr ago until …

The stratigraphic record shows Clovis projectile points to be restricted to sediments between
11,000 and 11,500 years old. Underlying deposits dating back 11,600 to 13,000 years are …

DNA from excrements can be amplified by means of the polymerase chain reaction.
However, this has not been possible with ancient feces. Cross-links between reducing …

Archeological materials from 8.5 meters of deposits in a stratified rock shelter in the
Absaroka Mountains near Yellowstone National Park provide a projectile point sequence …

Little Salt Spring in southwest Florida, consisting of a shallow, water-filled basin above a
deep, vertical underwater cavern, was a freshwater cenote in the peninsula's drier past. It …

Analyses of well-preserved plant remains from ancient packrat (Neotoma) middens have
yielded much information on the history of vegetation, fauna and climate from the more arid …

By far the most numerous fossils representing the first abundant life on the earth are the hard
parts of various marine animals without back bones: shells and similar fragments of external …

Fig. 1. Production ofsynthetic organic chemicals, including tar and primary products from
petroleum and natural gas, 1945 to 1986. ago.(2). Ames et al. note that some pyrolysis …

THE problem of the age and nature of the first human colonization of the New World has
divided the archaeological profession for more than a century. Even now, there is general …