>Every cog-sci and every linguist in the world understands AI is impossible. Every engineer understands extended space travel is impossible. Every biologist understands living on an alien planet is impossible, especially if gravity is a different value from Earth's. Our skeletal and circulatory systems specifically evolved to counteract the effects of precisely g, and when that value changes, we break down and die almost immediately. It is very likely nobody could survive for even 2 years on Mars, a planet of 38%g, before they succomb to blindness, severe osteoperosis, or stroke due to blood clotting. Births are out of the question. We've known this at least since the Mariner 6 flyby, but really a few decades earlier. The famous Strugatsky brothers (Soviet SF writers) guessed it in 1957 almost a decade earlier. Ironically SF was predictive for once - in what science could not accomplish. They did what every SF writer who does enough research does: change to soft-SF and focus on politics. Same thing happened to Verne and Wells when technology caught up to their imaginations and stopped them dead.
