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When did the Acheulean industry begin and end?

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The Acheulean industry was the first standardized tradition of toolmaking used by Homo erectus and early Homo sapiens.

Regarding its timeline:
* Beginning: The industry began between 1.7 million and 1.5 million years ago, with some evidence dating its emergence as early as 1.4 million years ago at Olduvai Gorge.21
* Ending: It lasted until approximately 250,000 to 200,000 years ago, at which point it was gradually replaced by or transitioned into other traditions, such as the Levalloisian stone-flaking technique and the Mousterian industry.21