Physics
The Role of Seismic Communication in Elephant Social Dynamics
Quick fact
Elephants can produce rumbles below 20 Hz that travel through the ground for kilometers, and they detect these seismic vibrations using sensitive nerves in their feet and trunks—allowing them to coordinate movements and warn each other of danger without hearing a sound.
Why this is interesting
You've just felt a faint rumble through the ground—yet there's no earthquake. What if that vibration was a message?