Plants Last updated on June 9, 2023 Topic; see backlinks Backlinks 2023 07 17 learning things Link roundup Low-effort Link Roundup (July 17, 2023) Plants can tell when you're touching them This article talks about a study showing that despite not having nerves, plants can detect touch. Plants scream when stressed When they’re stressed out, plants emit ultrasonic sounds. We can’t hear them, but some animals can.