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These include fossil remains believed to be of human ancestors who lived 3.5 million to 4.5 million years ago.
The earliest archaeological sites include those at Hadar, Ethiopia; Olduvai Gorge and Laetoli, Tanzania; East Turkana, Kenya; and elsewhere in East Africa.
At that time, most archaeological work was confined to Europe, to the so-called cradle of civilization in southwestern Asia, and to a few areas of the Americas.
Today, archaeologists study the great cultural diversity of humanity in every corner of the world.
These remains include the fossils (preserved bones) of humans, food remains, the ruins of buildings, and human artifactsitems such as tools, pottery, and jewelry.These sites contain evidence of the first appearance of bipedal (upright walking), apelike early humans.Laetoli even reveals footprints of humans from 3.6 million years ago.Archaeological studies have also provided much information about the people who first arrived in the Americas over 12,000 years ago.Archaeologists have documented that the development of agriculture took place about 10,000 years ago.