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How long did the Oldowan tool industry last?

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The Venus of Willendorf, a small Upper Paleolithic limestone figurine with exaggerated female features and textured head, displayed against a black background. — Paleolithic Period The Venus of Willendorf, a Upper Paleolithic limestone figurine originally colored with red ochre, 30,000–25,000 bce, found at Willendorf, Lower Austria; in the Natural History Museum, Vienna.

The Oldowan industry was a toolmaking tradition that persisted for nearly 1 million years. This early Paleolithic technology, characterized by simple, crudely worked pebble tools, eventually gave way to the more standardized Acheulean industry as techniques gradually improved.1