A heavy reliance on the plants that later would become agricultural staples has been found at the Ohalo II site in Israel dating to as much as:

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The Ohalo II site in Israel, dating back to around 19,000 years ago, shows evidence of pre-agricultural plant gathering and consumption, indicating a heavy reliance on wild cereals that would later become staples in agricultural practices. This predates the commonly recognized advent of agriculture in the region.

A Heavy Reliance on the Plants That Later Would Become