## What this is A 3D recreation of the Deep Time Aquarium, a fictional cozy aquarium where each tank spans a different geological era plus a speculative future. Five tank halls. Cambrian Bay shows trilobite-cousins drifting through warm-blue Cambrian shallows. Devonian Glass shows placoderm-cousins gliding through emerald-tinted ancient seas. Cretaceous Arch shows mosasaur-cousins (cozy, not violent — they're curious not hunting) under a vaulted glass dome. Modern Reef is the warm-coral tank where Bartholomew the moon jelly drifts, Esmerelda the octopus changes color, Ribbon the eel waves, and Marble the rare ribbon-snail broods. Speculative Future is the deep-violet pelagic tank where Halcyon the Lantern-Drifter glows in the dark with bioluminescent fronds. Curator Marigold (NEW recurring cast — gentle, encyclopedic, scarf in every season) leads the 4pm tour. The Pemberton twins Tabitha and Theodore (10 years old, Mrs. Pemberton's grand-niece and grand-nephew) press their noses against the Cambrian glass. Mr. Whitford brings his grandkids Mira (7) and Otto (5) for a behind-the-scenes peek. Captain Crunch the husky (in his service-dog carrier) tags along quietly. Twenty-four director cameras cycle. The Timeline Fork Panel splitscreens FOSSIL RECORD vs SPECULATIVE BRANCH per hall. Drama ladder tracks four quiet stakes: Ribbon-snail brood %, Deep-sea wing funding %, School-group delight %, Quiet-hum %. 150 entities total (30 named sea creatures + 8 visitors + Curator + 80 ambient + 30-name pool). The aquarium *remembers*. localStorage saves `deep_time_aquarium_v1` (cycle highlight, cumulative visits, Halcyon-look-at-you count, drama meters), AND read-only loads `kepler9_orbit_v1`, `stillwater_hold_v1`, `echo_base_v1`, `cinema_of_fate_v1`, `museum_of_what_ifs_v1` for crossover chyron. Each ten-minute reseed advances the cycle highlight (Brood-watch / Armor-check / Mosasaur loop / Snail brood-day / Lantern-drifters). You don't play it. You watch it. And it remembers across five other demos. ## Why this is mind-blowing The chyron is the secret weapon: "Cycle 4 — Marble the ribbon-snail broods (Ribbon-snail brood %: 47). Marigold notes the Speculative Future creature resembles the cooling-loop coolant on Kepler-9 Orbit. Otto presses his nose against the Cambrian glass." That single line stitches three halls AND a crossover demo in one beat — Marble on the Modern Reef close camera with the brood pouch translucent under the warm-coral light (drama ladder rung 2 of 4 "brood progressing", chyron pulls from `deep_time_aquarium_v1` brood meter), Marigold on the Speculative Future curator-explaining camera with her scarf catching the deep-violet glow (chyron pulls Kepler-9 line from `kepler9_orbit_v1`, recurring cast +1 for Curator Marigold), and Otto on the Cambrian eye-level-glass close camera with the trilobite-cousin gliding past (interaction sparkle as Mira giggles, recurring cast bond Whitford-grandkids +1). The mid-cycle twist is the heart: at minute 5, Halcyon the Lantern-Drifter (the gentle pelagic) drifts UP to the glass, fronds bioluminescent, and LOOKS AT YOU through the camera. Marigold whispers "Hello, you." Captain Crunch the husky perks his ears. The moment is gentle, not scary — meta 4th-wall but warm. Multiply that by 30 named sea creatures with cozy names (Bartholomew the moon jelly, Esmerelda the octopus, Ribbon the eel, Marble the ribbon-snail, Halcyon the Lantern-Drifter), 24 director cameras, fossil-record vs speculative-branch splitscreen per hall, a CROSSOVER CHYRON reading five other demos, four quiet-stakes drama meters, and a mid-cycle Halcyon-looks-back twist, and you've got a David-Attenborough-at-Hogwarts stream that genuinely earns its multiverse scope. Tone is COZY: NO predator-prey violence, NO graphic feeding, NO real Latin/scientific names (extinct species use `-cousin` suffix to avoid confusion with real animals). ALL FICTIONAL.