IIRC Venus doesn't have active plate tectonics, but does have a molten core. Meaning every so often it undergoes a massive global resurfacing event. Several thi

IIRC Venus doesn't have active plate tectonics, but does have a molten core. Meaning every so often it undergoes a massive global resurfacing event. Several things support the theory, and we can't date when or how often it happens, just a while longer than we've been actively watching it and the next one is due: well we don't know yet, so whenever. Not to mention the crushing pressures and temperatures hot enough to have molten lead on the surface. Floating cities are really the only way to do it on Venus.