 associative learning in plants, which is a hallmark of intelligence in animals. She has pea learning studies that are quite fascinating. She is someone who, if you've heard the idea that plants can hear running water in sealed pipes, which is a phenomenon that plenty of people who deal with city infrastructure know about, because root intrusion. You have a sealed water pipe, and then a tree root plows right through it, and then they have to dig up the whole pipe.