Colonizing the moon and mars would lead to speciation because of the effects of reduced gravity, I would imagine. That said, lunar and martian babes will likely

Colonizing the moon and mars would lead to speciation because of the effects of reduced gravity, I would imagine. That said, lunar and martian babes will likely be hot if they stay in shape. Think about the effects of low/no gravity, and no sunlight on aging--35 year olds will probably look 20. At some point, there will definitely be an us/them feeling as the culture and needs of the societies diverge.