Today’s ‘Galaxy’ Insight –“The Accidental Evolution of Homo Sapiens”

 

 

Brain-health

 

"If one small and odd lineage of fishes had not evolved fins capable of bearing weight on land (though evolved for different reasons in lakes and seas,) terrestrial vertebrates would never have arisen. If a large extraterrestrial object—the ultimate random bolt from the blue—had not triggered the extinction of dinosaurs 65 million years ago, mammals would still be small creatures, confined to the nooks and crannies of a dinosaur's world, and incapable of evolving the larger size that brains big enough for self-consciousness require.


"If a small and tenuous population of protohumans had not survived a hundred slings and arrows of outrageous fortune (and potential extinction) on the savannas of Africa, then Homo sapiens would never have emerged to spread throughout the globe. We are glorious accidents of an unpredictable process with no drive to complexity, not the expected results of evolutionary principles that yearn to produce a creature capable of understanding the mode of its own necessary construction."

Stephen Jay Gould, paleontologist, evolutionary biologist, and historian of science who spent most of his career teaching at Harvard University and working at the American Museum of Natural History in New York.

 

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Image credits: alznet.org and achievement.org

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