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The Vital Question
Nick Lane’s *The Vital Question* tackles biology’s most perplexing unsolved mysteries: why complex life evolved only once on Earth, why prokaryotes remained simple for billions of years, and what defines life’s core nature. Moving beyond gene-centric evolutionary theories, Lane centers his investigation on bioenergetics—revealing how proton gradients and chemiosmosis, the universal energy mechanism shared by all life, shaped evolution’s trajectory. He explains that eukaryotic life arose from a single, chance endosymbiotic event between an archaeon and a bacterium, which unlocked the energy surplus needed to support large genomes and complex cell structures. The book also connects these evolutionary roots to real-world implications, from understanding mitochondrial diseases and aging to redefining how we search for extraterrestrial life. Blending rigorous science with compelling narrative, Lane offers a unifying framework that reshapes our understanding of life’s origin, limits, and potential.
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