Fister Roboto posted:

They don't get into it in the show, but yeah, the San-ti do eventually get to the point where they can accurately predict chaotic and stable eras. But then they discover another problem, which is that their planet is eventually going to spiral into one of the suns.

There's another thing that they don't mention in the show that is also kind of important. The giant human computer actually worked - mainly because the San-ti have dozens of limbs and can do complex calculations in their heads quickly - but it failed to account for general relativity.