100 Million years AD (Hothouse World)

Introduction:

Earth has entered a new phase of extreme global warming. The ice caps have melted entirely, flooding continents and raising sea levels by over 100 meters. Tropical rainforests, sprawling wetlands, and vast shallow seas dominate this lush, humid planet. Reptiles, amphibians, and invertebrates thrive, filling niches once held by mammals.

Geography and Climate:

Greenhouse Effect and Rising Seas:

Polar ice caps are gone, and sea levels have submerged much of the continents, forming inland seas and wetland networks.

Bengal Swamp - Coastal Wetlands:

Once part of South Asia, now an expansive mangrove-like wetland teeming with amphibians, reptiles, and invertebrates. Giants like Toratons shape the ecosystem, while predators like Lurkfish and Swampus dominate its waters.

Shallow Sea - Warm Algal Reefs:

Red algae replace coral as reef-builders, creating underwater labyrinths. Predators like Reef Gliders and Needlefinns prowl, while filter-feeders like Glassrays and Glintfins fill peaceful niches.

Antarctic Forest - Tropical Rainforest:

Antarctica, now on the equator, is a dense rainforest buzzing with life. Flutterbirds flit through the canopy, Falconflies and Spitfire Birds bring danger, and predators like the Plumeserpent lurk in the shadows.

Great Plateau - Alpine Highlands:

Towering peaks and thin air define this isolated ecosystem. Gliders like Windrunners soar the skies, Silver Spiders weave canyon-spanning webs, and hardy mammals like Poggles cling to survival.

Evolutionary Highlights:

Reptiles and Amphibians Take Over:

Massive tortoises like Toratons reshape landscapes, while amphibious predators like Swampus lead an evolutionary push onto land.

Intelligent Invertebrates:

Advanced cephalopods like the Swampus show tool use, while spiders like Silver Spiders develop eusocial colonies rivaling ants.

Deadly Mimics and Defenses:

Creatures like Spitfire Birds and Spitfire Beetles evolve chemical defenses, while false mimics exploit predator confusion to survive.

Geological and Environmental Changes:

Flooded Continents:

Submerged lowlands turn into shallow seas and lagoons, connecting habitats across continents.

Antarctica's Transformation:

Its migration to the equator creates an explosion of biodiversity, turning it into a tropical rainforest paradise.

Mountain Peaks and Plateaus:

Tectonic activity raises regions like the Himalayas, forming alpine ecosystems isolated from lowland heat.

Pacific and Indian Ocean Expansion:

New volcanic islands and atolls form, becoming isolated evolutionary labs for new species.

Outro:

This Hothouse World is a vision of Earth transformed—lush, humid, and teeming with life pushed to extremes. From flooded wetlands to towering plateaus, creatures big and small thrive in this tropical Eden, showcasing the boundless creativity of evolution.