But even the idea of people living in space does not seem impossible.
Men and women have a right to live in space.
This was his first paper about people living in space.
"Our show doesn't really live in time and space," he said.
"We're just going to have to become better at living and working in space," he said.
Learn what it's like to live and work in space.
Just as some of us live our lives in space or on other planets.
People have lived in space every day since the year 2000.
Scientists study what happens to people when they live in space.
They simply were not meant, any of them, to live in space.