NATURE: "WHAT PLANTS TALK ABOUT"
PBS, 8:00 p.m. ET
This installment, an unofficial sequel to David Attenborough’s The Private Life of Plants, uses time-lapse photography and other high-tech tricks to let us see plants in a new way: as beings with preferences, motivations, even emotions. According to this, some plants emit a chemical smell – part warning to neighboring plants, part cry of anguish – when they’re hurt. So that smell of freshly mown grass? It’s the olfactory equivalent of a silent scream of pain. It’s like a vegetarian snuff film. But it’s fascinating. Check local listings.