Anthropologists Leslie Aiello and Robin Dunbar have argued that what ability appeared in humans by at least 250,000 years ago?

Name: Anthropologists Leslie Aiello and Robin Dunbar have argued that what ability appeared in humans by at least 250,000 years ago?
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Aiello and Dunbar have argued that the ability for language appeared in humans by at least 250,000 years ago, based on their research into brain size evolution and social dynamics.

Anthropologists Leslie Aiello and Robin Dunbar Have Argued That What