Dr. James Lovelock, Scientist Who Created Gaia Theory, Dies At 103

Dr. James Lovelock was a groundbreaking environmental scientist who helped launch a movement. Lovelock developed the Gaia theory, which argues that Earth is a singular, self-sustaining organism and regulates its temperature and atmosphere to remain stable and support life unlike any other planet. Sunday TODAY’s Willie Geist remembers a life well lived.

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