A delightful piece in Tuesday’s NYT Science Times, “How to Talk to Fireflies” by Joanna Klein, which is about animal communication — between fireflies, by flashing lights — though I was startled by a fact that came up in passing. The first paragraph:
As Earth rotates in the summer, fireflies whisper sweet nothings to each other in the most beautiful language never heard. For millions of years the insects have called to one another secretly, using flashes of light like a romantic morse code. With some rather simple technology — a light and a battery — scientists have been decoding their love notes for years. But recently I learned that you don’t have to be an entomologist to try to talk to fireflies.
Male common Eastern fireflies, flashing