November 5, 2025

The Thumb’s Secret: Evolutionary Impact on Human Brain

Thumbs play a significant role in human evolution, with recent research showing a link between thumbs and brain size. The longer the thumb, the larger the brain, leading to advanced cognitive abilities. This unique balance allowed for tool-making, language development, and technological advancements. Surprisingly, the connection between thumbs and brains is not exclusive to humans but is a shared story among primates, reflecting a deep coevolution that may hold the key to what makes us human.

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