View full lesson: http://ed.ted.com/lessons/can-plants-...

Can plants talk to each other? It certainly doesn’t seem that way: They don’t have complex sensory or nervous systems, like animals do, and they look pretty passive. But odd as it sounds, plants can communicate with each other — especially when they’re under attack. Richard Karban explains how.

Lesson by Richard Karban, animation by Yukai Du.