Sounds of Cacti and Gramophones

The chapter explores the historical use of cactus spines in gramophones for sound quality, cactus names like Big Nipple Cactus and Bonker Hedgehog Cactus, the symbiotic relationship between cacti producing nectar for ants, and the threats cacti face from climate change and illegal trade, including an anecdote about the dildo cactus.