The Truth About Plants

Scientists have figured out that plants know when you're touching them. This is either great news or terrible news for people who are sexually aroused by rubbing up against tree trunks. When a plant is being touched, slow waves of calcium ions move through their cells. And when that touch is removed, a set of faster waves is quickly released. So that's how scientists could tell that the difference. But of course, you already knew that because it's right there in the lyrics of the Beatles 1964 hit, I want to hold your plant.