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• Sequencing the dead to save the living: Reviving ancient genomes of long-extinct creatures offers a window into past extinctions—and may help prevent future die outs
• No gene is an island: Even as biologists catalog the discrete parts of life forms, an emerging picture reveals that life’s functions arise from interconnectedness
• The decider: Informing the debate over the reality of ‘free will’ requires learning something about the lateral habenula
• This week's table of contents