Editor's Summary21 January 2010A robust approach to flexibility The role of mutational robustness in evolution has been a topic of much debate and controversy. On the one hand, it would seem to impede adaptation by making it less easy for a new phenotype to develop in the event of environmental changes; on the other it is surely advantageous for an organism to buffer its phenotype against possibly
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Bats and dolphins trod an identical genetic path to evolve a vital component of the complex sonar systems they use to pursue and catch prey. The finding is unusual, because although many creatures have independently evolved characteristics such as eyes, tusks or wings, they usually took diverse genetic routes to get there. Analysis of a specific gene has now demonstrated that although bats live in
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