Snakes and how they helped our big brains evolve

The threat of snakes gave primates superior vision and large brains -- and fueled a critical aspect of human evolution, UC Davis anthropology professor Lynne Isbell argues in a new book.

From the temptation of Eve to the venomous murder of the mighty Thor, the serpent appears throughout time and cultures as a figure of mischief and misery.

The worldwide prominence of snakes in religion, myth, and folklore underscores our deep connection to the serpent—but why, when so few of us have firsthand experience?

The surprising answer, University of California, Davis, anthropology professor Lynne A. Isbell suggests, lies in the singular impact of snakes on primate evolution.

In "The Fruit, the Tree, and the Serpent: Why We See So Well" (Harvard University Press; April 30, 2009; $45.00), Isbell tells us that predation pressure from snakes is ultimately responsible for the superior vision and large brains of —and for a critical aspect of evolution.

Drawing on extensive research, Isbell further speculates how snakes could have influenced the development of a distinctively : our ability to point for the purpose of directing attention. A social activity (no one points when alone) dependent on fast and accurate localization, pointing would have reduced deadly snake bites among our hominin ancestors.

It might have also figured in later human behavior: , "The Fruit, the Tree, and the Serpent" eloquently argues, may well have given bipedal hominins, already equipped with a non-human primate communication system, the evolutionary nudge to point to communicate for social good, a critical step toward the of language, and all that followed.

Source: University of California - Davis


Explore further

Seeing the Serpent

Citation: Snakes and how they helped our big brains evolve (2009, May 1) retrieved 23 January 2022 from https://phys.org/news/2009-05-snakes-big-brains-evolve.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors