The first ice age of the Ultimocene has ended, ushering in dramatic climate change as a result of a massive coal seam fire set beneath Serinarcta. An age of sapience, for now, closes with the disappearance of the sea stewards, and a world no longer governed by intelligent species returns to its wild roots. Nature at the end of the mid-Ultimocene is again red in tooth and claw, with much of the cooperative ecology of the past era having broken down - though as things stabilize again, new relationships will form. The end Ultimocene demonstrates that even though living things have broadly increased in complexity since Serina began, evolution is not goal-orented. As selective pressures change, surviving species may no longer need to be quite so smart to survive, if instead they can be tough. 

The world will warm again, but not forever. The hothouse is an interlude, not an end to the eventual global cooling Serina will ultimately face. But in this short window, Serina will showcase its greatest sights and species seen yet.

Explore the Hothouse
Click the dropdown menus below to visit each sub-period.

Or go on to the final stretch, the last era of Serina.