It wasn't until maybe a year before we were done writing — and we wrote for four years — that we decided this book is actually about why space settlements aren't coming soon.
You don’t even have to spin them up. Just drill a big hole through the asteroid - maybe with concentrated sunlight - and build a small O’Neill cylinder inside.
beltalowda
You don’t even have to spin them up. Just drill a big hole through the asteroid - maybe with concentrated sunlight - and build a small O’Neill cylinder inside.