Are Romulans, Vulcans and Remans the same race? I know that around the 4th century Vulcans who rejected the teachings of Surak (whom they call The Dissembler) left Vulcan to go to Romulus, but who are the Remans? According to Memory Beta, they are betrayed miners who were turned into slaves after voluntarily going to mine Remus, if this is true there is still the question of why the Remans are telepathic whilst the Romulans aren't.
So my main question is, why are Remans telepathic while Romulans aren't.