science ๐ฌ 165-million-year-old katydids prove ancient ultrasonic talk
Fossil katydids from the Middle Jurassic period show the first signs of ultrasonic insect communication. This discovery was made by a researcher at Capital Normal University, Beijing, after a 12-year study. The findings, published on Wednesday, detail calls ranging from 5 to 20.5 kHz across nine species. This suggests pure-tone calling was an anti-predator strategy against early mammals, not a response to bats. Researchers will continue to explore the co-evolution of sound in terrestrial animals. ๐ฆ