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January 31, 2025

When a fire burns in an urban area, it unleashes a slurry of chemicals. Scientists are trying to untangle the chemistry at play. Plus, early analysis of asteroid samples from NASA’s OSIRIS-REx mission shows the residue of an icy brine and a soup of amino acids. And, on the heels of some big quantum computing advances last year, what’s next in 2025?

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The Story of Saliva

Why do newborns drool excessively? How many pints of saliva does a person generate daily? (Hint, it’s more than one.) And more spit mysteries excerpted from “Gulp: Adventures Down the Alimentary Canal.”

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