25 million years after man - No one can live forever, and no species does either. Sometime in the future humans were killed off in a deadly plague caused by the onslaught on global warming. Humans were not the only species to go extinct, but a great number of megafauna and other species disappeared as well. Eventually, about five million years later, the earth suffered an ice age which meant even more species disappeared. Even with so many losses to the world's biodiversity, there was hope and many new species did evolve from what was left. By 10-15 million years after man, the earth's habitats had healed with forest now spreading rapidly and desert becoming more and more saturated thanks to a newly healed ozone layer (the ozone layer can be healed and destroyed). Plenty of time has returned earth to a similar way to the way it was before the age of man. Thus begins the tour of a world that man will never see.