Facing the loss of her Elkmont cabin in the Great Smoky Mountains—a family treasure for five generations—Lynn Faust began to pay more attention to the fireflies there, the “light show,” as the family called it, where thousands of fireflies would light up in unison. When she read that synchronous fireflies did not exist in North America, she knew that scientists were wrong. The creatures were right in her own yard! Realizing just how little was known about these enchanting insects, she set out to observe them, becoming a self-taught firefly expert and unveiling the mysteries of nature’s tiny lanterns.