"You could actually use some of those obscene billions of dollars of money to improve life here on earth." Elon Musk ...

They might've looked something like the space station in the film "2001: A Space Odyssey." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. There ...

There once was a dream of cities in space — vast cylindrical habitats, self-sufficient and populated by millions who would look down on the Earth from their lofty perch. Back in the 1970s, one serious ...