> “thinking about space habitats” I think Carmack is a genius and admire his work ethic, but I can't understand what interests smart people like him about huma

> “thinking about space habitats” I think Carmack is a genius and admire his work ethic, but I can't understand what interests smart people like him about human space travel. Might be able to get more people excited about maintaining our amazing ecosystem if we talked about "Spaceship Earth" more.