Memory is fallible. Dreams overwrite the reality, fond fantasies inform the dreams. - Adrian Tchaikovsky

By all means, go up to the surface and have the run of the Zone, Doctor Marks. Pit the indefatigability of your human spirit against the planet. See how that goes for you.

The emergent ecologies that were recolonising the place were very light on mammals and birds. You got little ones, mostly nocturnal even when their ancestors had been diurnal. The big winners were amphibians, reptiles, bugs. Because hot and damp works for ectotherms.

But haven’t you heard? We’re in a collapsing climate disaster. The Zone’s just one part of it. Collapsing as in, all our usable biomes crunching together as the heat pushes out from the equator. And you’ve all seen how that goes. Everything wants to live. People move north and south, animals move north and south, diseases move north and south. Waves of epidemics as all those people and animals and microbes mix in new configurations. Every year a new wave of hospitalisations from some fresh plague that’s mutating to survive the conditions we’re imposing on the world.