One of the best parts of summer, if you live in the right region to see it, is when swarms of fireflies illuminate the evening twilight. That bioluminescent glow is a form of communication for the little critters, and scientists have mostly cracked the code. That's how it's possible to create something like the Firefly Communicator, an inexpensive smartphone-controlled gadget that flashes signals to fireflies in their own language. The only caveat? The signals are almost exclusively booty calls.
Related: Every Human Is Bioluminescent