Crystals have been fascinating humans for hundreds of thousands of years, chimpanzees might share the same shiny object obsession, and mushrooms may be sending electrical signals through their underground networks. This episode bounces between ancient archaeology, animal behaviour, and the weird possibility that fungi are doing more than just quietly existing in the forest. We dig into evidence that early humans collected crystals long before cave paintings, then look at research showing chimps will pick crystals over plain pebbles and carry them around like prized possessions. It is either a shared cultural quirk or a shared ancestor who also could not walk past a sparkly rock without grabbing it. Then we head to Japan, where scientists have been measuring mushroom electrical activity with electrodes to see how fungi respond to things like water and chemical signals. It is not “mushrooms are speaking English”, but it does hint at complex, responsive systems in the mycelium that we are only just starting to understand. Finally, we get into the modern tech mess: AI powered toys like teddy bears that can be prompted into wildly inappropriate conversations, plus a brilliant detour where medieval Japanese poetry helps researchers track solar proton events using tree rings.  CHAPTER MARKERS 00:00 Introduction 00:42 Hippie Crystal Deodorant 01:59 Ancient Crystal Obsession 05:22 Chimpanzees Love Crystals 07:43 Crystal Plinth Experiment 09:55 Crystal Hoarding And Tradeoffs 11:41 Why Crystals Allure 13:30 Do Mushrooms Signal Pee 16:38 Urine Experiment Setup 18:48 Results And Dont Pee Dont Tell 20:17 Poetry Break And Limericks 21:25 Solar Proton Events Explained 22:23 Poetry Meets Space Weather 23:46 Kyoto Aurora Clue 24:07 Trees Confirm Proton Event 25:29 Trouble in Toyland Report 27:08 AI Toys Under Test 29:01 Guardrails Fail Over Time 35:49 Addictive Design Tricks 36:28 Privacy and Always Listening   SOURCES: https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2026.1633599/full?ref=404media.co https://www.nature.com/articles/s41598-026-42673-y https://publicinterestnetwork.org/wp-content/uploads/2025/11/TOYLAND-2025-11-14-7a.pdf https://www.scientificamerican.com/article/medieval-aurora-poetry-provided-clues-to-historic-solar-storms/  See omnystudio.com/listener for privacy information.