The "battle of the sexes" format has been used in four seasons. The Amazon was the first season to have one tribe with guys and the other with girls. The next season with the twist was three seasons later with Survivor: Vanuatu. Three more seasons later, Survivor: Panama also had the twist, but then divided the two genders into four tribes based on age: One tribe with younger guys, one tribe with younger girls, one tribe with older guys, and one tribe with older girls. The twist did not last long as after three days the tribes were dissolved and switched. The latest season to include the twist came 12 seasons after Panama, in Survivor: One World. The twist wasn't as seen as the bigger twist was that the two tribes were living on the same beach.