Pictured above is a fossil footprint believed to have been created by a hominin species known as Paranthropus boisei, one of 12 such footprints unearthed in Kenya that date back 1.5 million years.
(CNN) — More than 1.5 million years ago, two different species of ancient human crossed paths on a lakeshore, perhaps locking eyes with each other. These early forerunners of Homo sapiens wandered in ...
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