How the venus flytrap eats a frog

It's electrical signals that allow the lobes of a venus flytrap to snap shut faster than a frog can flee. In animals, those sort of signals travel via the nervous system, which plants like the flytrap conspicuously lack. In a way, it's like the plants can send email without the Internet. How's it work? Science writer Ferris Jabr explains.
How the venus flytrap eats a frog