The Threespine stickleback fish is known to have evolved independently from its marine ancestors in thousands of freshwater lakes across the northern hemisphere, a process called parallel evolution. This process appears to occur within decades, providing scientists a unique opportunity to actually observe vertebrate adaptation in nature. A new study, published in Science Advances, details the genomic changes that drive their rapid evolution, the findings from which may shed light on which genetic changes might underlie the process of natural selection in other species. [More information here.]
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