I can hear you

Unlike our Congress, a rain forest vine and nectar-feeding bats know how to work together.

The vine, Marcgravia evenia, has dish-shaped leaves that bounce back echoes that are easy for the bats to identify through echolocation.
“They have a very special kind of echo,” says Ralph Simon, a biologist at the University of Ulm in Germany. “This echo is very loud and has a constant signature from