How many species on Earth have antennas?

Ants and termites are the only species that have antennas. In fact, the word "antenna" comes from the Latin word for "sail," because the ancient Romans thought of them as sails on a ship. Ants and termites are both social insects, meaning that they live in colonies and work together to survive. Antennas are important for these insects because they use them to communicate with each other, find food, and navigate their surroundings.