An artist's impression of a giant asteroid colliding with Earth. A similar event—although a much smaller one—occurred 66 million years ago, causing the extinction of dinosaurs. Nuclear war has the potential to lead to human extinction.(Image: Don Davis / NASA, via Wikimedia Commons)

Earth scientists Brian Toon and Alan Robock discuss their latest book on nuclear winter, “Earth in Flames” (Oxford University Press, 2025).


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