One of the first books I ever read told the story of Kemlo, a boy born on a Space Station above the Earth.
His adventures took him and friends outside the safety of the station on space scooters.
The adventurers were mix of children born in space and those on Earth...the boys born on the station were acclimatized and moved freely...the boys born on Earth wore bulky suits.
I was six at the time, the moon and stars were fiction.
What fictional stories being written now will be factual in seventy years time?