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Archaeologists have also recorded how primitive forms of humans spread out of Africa into Asia about 1.8 million years ago, then into Europe about 900,000 years ago.The first physically modern humans, Homo sapiens sapiens, appeared in tropical Africa between 200,000 and 150,000 years agodates determined by molecular biologists and archaeologists working together.[Journal of Anthropological Archaeology -61.]Sampling Issues in Evaluations of Diet and Diversity: Lessons from Diablo Canyon. [In Maritime Adaptation and Seaside Settlement along the Pacific Coast of North America during the Pleistocene-Holocene Transition, edited by Jim Cassidy, Robert Ackerman, and Irina Ponkratova, pp. [Journal of California and Great Basin Anthropology -31.]Report on the Vertebrate Fauna from CA-STA-207, Central Diablo Range, Stanislaus County, California: Evidence for an Upland Adaptation with Long-Term Stability in the Central Diablo Range (SCA Proceedings - PDF]. [In Exploring Methods of Faunal Analysis: Perspectives from California Archaeology, edited by Michael A. Entire contents Copyright 2001-2015 by Coyote Press. For the most part, the only things that survive are durable items such as potsherds (small fragments of pottery), tools or buildings of stone, bones, and teeth (which survive because they are covered with hard enamel).Because many items disintegrate over time, archaeologists get an incomplete view of the past that they must fill in with other kinds of information and educated reasoning.

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Some sites also contain evidence of the earliest use of simple tools.

Today, archaeologists study the great cultural diversity of humanity in every corner of the world.

Archaeological study covers an extremely long span of time and a great variety of subjects.

Douglass, Richard Ciolek-Torrello, Sarah Van Galder, Benjamin R. The Coleville and Bodie Hills NRCS Soil Inventory, Walker and Bridgeport, California: A Reevaluation of the Bodie Hills Obsidian Source (CA-MNO-4527) and Its Spatial and Chronological Use. Spatial and Temporal Distributions of Archaeological Heated-Rock Cooking Structures in the Transverse Mountain Ranges: Proposed Markers of Land-Use Shifts since the Early Holocene [SCA Proceedings - PDF].

Grenda, Jeffrey Homburg, Manuel Palacios-Fest, Steven Shelley, Angela Keller and Davis Maxwell Spatial and Temporal Distributions of Archaeological Heated-Rock Cooking Structures in the Transverse Mountain Ranges: Proposed Markers of Land-Use Shifts since the Early Holocene [SCA Proceedings - PDF].

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