There are many reasons why fireflies glow. One of the best-known examples of bioluminescent beings in nature, fireflies use their light as a warning to potential predators, to identify other fireflies, and of course, to attract a mate.
But while the sight of them lit up is enrapturing, these small insects have in turn inspired a light bulb moment for a team of international researchers at the University of Missouri in the US.
Harnessing the same chemical reaction that makes fireflies glimmer, the team has developed a medical imaging device that lights up when inserted inside the body.
Potential future uses for such a device, in both humans and animals, are already wide-ranging, including the development of better treatments for cancer, diabetes, and infectious diseases.