Venus probably had an Earth-like climate which evolved a wide variety of lifeforms, which culminated in the evolution of an intelligent species that built a glo

Venus probably had an Earth-like climate which evolved a wide variety of lifeforms, which culminated in the evolution of an intelligent species that built a global civilization. However, they powered this civilization with hydrocarbons pumped out of the ground, left over from decayed plant matter from eons before, so they could drive around in oversized SUVs, instead of living more densely and using trains to get around. Some of their species tried to warn them that disaster was imminent if they didn't change their ways, but the rest said this was just alarmism and that there was nothing wrong with cutting down their forests to have more grassland for raising large livestock for food. We can see now how this all worked out for the Venusians.