Tonight’s boring science for sleep dives into the weird ecology of urban subway tunnels, where darkness, heat, vibration, and constant airflow shape unexpected mini ecosystems. In classic Sleepless Scientist style, we follow the crumbs, leaks, dust, and microbes that turn transit infrastructure into a living laboratory. You will drift through gentle explanations of tunnel microbiomes, “subway snow” (metal and brake dust), water seepage, mold and fungi, pest food webs, and why some species thrive underground while others vanish. If you like calm science storytelling, quiet facts, and slow, relaxing ecology, press play and let the city’s hidden nature lull you to sleep. 📚 Chapters:0:00:00 Down the Stairs, Into the Other City0:14:39 The Air You Breathe Down Here0:29:18 Invisible Passengers: Microbes on Every Handle0:43:58 Rats, Roaches, and the Art of Finding Dinner0:58:37 Small Hunters in the Dark: Spiders, Beetles, and Moths1:13:17 Water, Warmth, and the Slow Drip of Time1:27:56 Stone, Rust, and the Taste of a Tunnel1:42:36 How the Surface City Feeds the Underground1:57:15 Tracks as Pathways: Quiet Movement and Accidental Migration2:11:55 The Night Shift: When the Tunnels Exhale