Vulcans have emotions, dammit. They simply choose not to express them. When a Vulcan says, "Vulcans do not experience Emotion X," he or she is lying. Different Vulcans have differing opinions and abilities when it comes to how emotional they choose to act. Every single thing the Q tell humans about their true nature is intentionally misleading and in many cases an outright lie. The "Continuum" visited by Janeway and crew was nothing more than an illusion, and the Q Civil War was simply another inscrutable Q test/game. Andorians have two genders. The Aenar have become an endangered species by the 24th century, and eventually they die out completely. Romulans are the original species. Vulcans are Augments. The Vulcan/Romulan Schism was a result of differing views on genetic engineering.The logical faction believed enhancing their species was the logical thing to do, while the other faction viewed it as an abomination. This explains the genetic differences between Vulcans and Romulans, including the great strength possessed by Vulcans. Remans look like pale-skinned Romulans with more pronounced ridges. They do not look like ogres.