“Forget arks. We’re going to have to do it with speedy starships, so that people can get there in a couple of years (ship’s time), or not at all. And before we do that, robotic scout vehicles are going to have to check the planet out first to determine its habitability. Condemning generations of unborn innocent people to spend their lives in some nightmare, totalitarian prison ark is inhumane, unethical in the extreme.”
An asteroid the size of Ceres has been calculated to provide as many hectares/acres of arable land inside the asteroid as all of the arable land on the Earth. Such a craft would be a mobile world rather than a restrictive prison. A cavern space wit a ceiling about 700 meters in height is sufficient to give the impression of a blue sky, while centrifugal force provides a substitute for Earth’s gravity necessary for good health.
Are we not on an ark like this NOW?