Discover the science behind vibrant fall colors and what triggers leaf color changes! Fall’s fiery colors are one of nature’s most stunning shows, but did you know those brilliant reds, oranges, and yellows were hiding all summer long? It’s true! The vibrant hues you see when the leaves change aren’t just about chilly weather—they’re all about sunlight, chemistry, and clever trees getting ready for winter. Learn more! Almanac.com/Fall-Leaves | The Old Farmers Almanac

Autumnal equinox explained: Why fall begins today