This year's flu vaccine protects against a few different virus strains, including the H1N1 seen here. The fuzzy outer layer is made of proteins that allow the virus to attach to human cells. NIAID/Flickr hide caption

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The Alto Yellowjackets take the field on Nov. 13, a month after Matthews died. Lauren Silverman/NPR hide caption

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If you cook meat too long, at too high a temperature, the chemical reaction that creates tasty flavor and aroma compounds keeps going, creating other compounds. Some of those compounds can be carcinogenic when we consume them in high-enough concentrations. Morgan McCloy/NPR hide caption

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