On a cool summer night, you might see fireflies glow. What you may not know is that fireflies are key to discovering new drugs too. Fireflies glow through a process called bioluminescence. In it, there are molecules that combine with energy and give off the green glow. Scientists are using those molecules and attaching them to cells to learn more about how these cells work. Following the glowing molecule is like watching a person in a darkly-lit room who has a glow stick. You know exactly where they are. The same goes for the part of the cell that has the glowing firefly molecule attached to it.
Now, fireflies are not the only species that glow. There are worms that glow along with the anglerfish, which you’ve seen in major movies. There are also deep-sea shrimp that glow. Out of all those organisms, the deep-sea shrimp has the most disturbing use of bioluminescence. When shrimps feel threatened by a predator, they vomits a glowing goo from their mouth to scare them off. That is a very effective means of bioluminescence!
All in all, bioluminescence is one of the tools that animals have. Nature provides some excellent ways to see things in the dark, which scientists borrow for discoveries. As you can see, the light from fireflies is a small beacon during the summer, but also for the discovery of new medicines.