News of the WeekEvolutionary Biology

On Ant Farm, a Threesome Coevolves

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Science  17 Jan 2003:
Vol. 299, Issue 5605, pp. 325
DOI: 10.1126/science.299.5605.325a

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Certain ants and the fungi they cultivate have evolved in synchrony for millions of years. But there is a third wheel in this relationship--a pathogen that infects the fungi. Researchers report on page 386 that, in terms of evolutionary history, this pathogen is as tightly entwined with the other two as they are with each other.