Child's shattered skull may be oldest Homo erectus fossil on Earth
In an ancient cave in South Africa, paleontologists have found evidence that three of humankind's oldest known relatives lived in the same place, at the same time.
That time was roughly 2 million years ago, and the place was the Drimolen Paleocave System near Johannesburg — part of a 180-square-mile (466 square kilometers) network of limestone caverns also known as the Cradle of Humankind. 

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