Can people be born in space?

It is possible that people will be born in space and live their whole lives there. These space people will be human beings who have left Earth to live in space colonies. The colonies will be gigantic spacecraft, many kilometers across, in which there could be whole cities, together with fields and lakes.

The colonies would grow their own food to support a human population of thousands of people. They could make special space products to trade with Earth, or be offer space holidays to Earth tourists. It all sounds like science fiction, but scientists have actually designed viable space colonies that may one day exist.