Oxygen's dual role: From poison to life's energy source

The "Opabinia" series, a collection of Korean translations of evolutionary science books, has significantly shaped how Korean readers understand evolution, moving beyond the simplistic "monkeys becoming humans" narrative. Over 19 years and 26 titles, the series has explored diverse topics from fossils to cellular biology, consistently asking how life arrived at its current forms. This commitment to depth and accuracy, avoiding condescension towards readers, has elevated the public's scientific literacy.

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Oxygen is a substance of evolution that changed the Earth, changed the metabolism of life, helped the birth of complex cells, and at the same time was deeply involved in the conditions of aging and death.

Now, the series features its first Korean author, Kim Hong-pyo, a pharmacologist and science communicator. His book, 'Oxygen, Glucose, and the Dawn of Metabolism,' delves into the intricate processes of cellular respiration. Kim reframes familiar concepts like breathing, explaining how oxygen acts as the final electron acceptor in a complex chain of reactions, ultimately producing water. The book traces the evolutionary path of glucose as life's universal fuel and how oxygen, once a poison, became a critical component for generating vast amounts of energy.

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How did life reach its current form?

Complementing Kim's work, the review highlights other books in the series that focus on oxygen's impact. Peter Ward's 'Gondwana 14: Oxygen' examines atmospheric oxygen levels throughout Earth's history, demonstrating how fluctuations influenced animal evolution, body size, and even mass extinctions. Nick Lane's 'Mitochondria' further explores the symbiotic relationship that led to mitochondria, the powerhouses of our cells, and how this energy revolution enabled complex multicellular life. Lane's 'Oxygen: The Molecule That Made the World' also addresses the paradox of oxygen: its life-giving energy production comes at the cost of cellular damage, linking it to aging and death.

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We often think that the oxygen we inhale comes out as carbon dioxide in the body. But the actual metabolism is not such a simple exchange.

Together, these books present oxygen not merely as a gas we breathe, but as a fundamental evolutionary force. It has shaped the planet, driven metabolic complexity, facilitated the emergence of intricate cells and organisms, and simultaneously laid the groundwork for aging and mortality. The "Opabinia" series, through its curated selection and now its inclusion of Korean scholarship, offers a comprehensive and nuanced view of life's grand evolutionary narrative.

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Evolution is not a process moving towards a perfect design, but a history of temporary measures to endure and utilize dangerous conditions.