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Bats add their voice to the FOXP2 story When it comes to the FOXP2 gene, humans have had most to shout about. Discoveries that mutations in this gene lead to speech defects and that the gene underwent changes around the time language evolved both implicate FOXP2 in the evolution of human language. More recently, patterns of gene expression in birds, humans and rodents have suggested a wider role in the production of vocalisations.
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