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Human Thumbs Got a Major Upgrade 2 Million Years Ago, Sparking a Cultural Revolution, Study Finds – Gizmodo

The human thumb is a marvel of evolution, allowing our ancestors to craft stone tools and radically expand their food choices. New research suggests our agile,…

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The human thumb is a marvel of evolution, allowing our ancestors to craft stone tools and radically expand their food choices. New research suggests our agile, dextrous thumbs appeared 2 million years ago, in a development that irrevocably changed the course of human history.
Many primates have opposable thumbs, but none are quite like ours. The human thumb, set in opposition to the other fingers, allows for precision grasping, which anthropologists consider a necessary physical attribute for crafting…

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