What If Humans Never Tamed Fire?

The extinction, when it finally came, was almost anticlimactic after everything that preceded it. The last confirmed *koroensis* site dated to roughly two hundred thousand years ago — not a mass catastrophe, but a slow contraction of range as a changing climate shrank the narrow temperature band the species had always depended on, combined, in the final layers, with evidence of direct contact: stone tools of a style associated with early fire-using *Homo* populations, found alongside *koroensis* remains for the first time in the fossil record.

Whether that contact was violent, competitive, or simply a matter of fire-users outcompeting a population that could never extend its range to escape them, the evidence couldn't say for certain. Amara resisted, in her final published conclusions, the temptation to write a clean narrative onto an ambiguous ending. "We don't know if this was a war, a slow displacement, or two populations that mostly avoided each other until the climate left one of them nowhere left to go," she wrote. "I'd rather report the uncertainty honestly than hand you a story that feels satisfying but isn't earned by the evidence."

What she would say, when pressed in interviews, was simpler: a population survived for over a million years without the one invention every surviving human lineage eventually made. Then the world changed in a way that only an invention like fire could have prepared anyone for, and the population that lacked it ran out of room to retreat.