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Fossilized footprints provide evidence of a human presence in the Saudi Arabian desert about 120,000 years ago.

UNIVERSITY OF COLORADO AT BOULDER—Archaeologists working in two Italian caves have discovered some of the earliest known examples of ancient humans using an adhesive on their stone tools—an important technological advance called “hafting.”

Archaeologists confirm strong social networks allowed early populations to prosper.

Scientists have unearthed a wealth of new evidence, revealing thousands of years of pre-Islamic human habitation and civilization in a seemingly unforgivable desert land.

Study finds evidence of local extinction and replacement even before Homo sapiens arrived.