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PNAS Profile of NAS member Eugene Koonin.

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  • News Feature: Can animal culture drive evolution?
    Once the purview of humans, culture has been observed in all sorts of animals. But are these behaviors merely ephemeral fads or can they shape the genes and traits of future generations? Photograph by David Ellifrit, courtesy of Center for Whale Research.

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  • Backbone configuration in Australopithecus
    Analysis of a 3.3 million-year-old Australopithecus afarensis skeleton from Ethiopia provides evidence that this early hominin had 12 thoracic vertebrae like modern humans and unlike extant African apes.
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