Whether they glimmer to attract prey, to ward off predators, or for another reason entirely, glowing organisms are some of the most mesmerizing wonders of nature. This stunning volume introduces elementary readers to bioluminescence and biofluorescence, using accessible language to explain how and why various organisms make their own light. Vibrant images allow readers to journey through woods haunted by fox fire, soar high with fireflies that punctuate a summer night's sky, and dive deep to view the myriad creatures that illuminate the ocean's depths. Boxed text encourages critical thinking about Earth's incredible biodiversity and the behaviors and chemistry of living things.