Zorpians

Zorpians are a human subspecies that have 4 arms and 2 heads. They live a much shorter life than humans because they cannot produce enough blood to work 2 brains and 4 arms, but while they are living they are very smart and most zorpians grow up to be scientists. They also grow 2x as fast as normal humans. They live on the planet Hippo-jobbly. Every single zorpian in the classicverse only adds up to 2 billion. There are over 1 million on Earth and most of the rest are on Centera.