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780,000-Year-Old Discovery Reveals That Early Humans Thrived on a Plant-Based Diet
(scitechdaily.com)
Not surprising. I remember reading that (some of) the ancestors of Home sapiens sapiens in East Africa first started regularly using fire about 400,000 years ago... to cook starchy tubers. Apparently that population didn't start eating animals for another ~300,000 years, and others didn't even leave the forest and start using fire until ~250,000 years ago or later. History is not an ethical guide in any case...