I just picked up TA, after been on a hiatus for such a long time. Love it.
However, I don't understand some of the new (race specific or not) planetary improvements. I've read the description, but still don't understand the significance of say having improvement X and not having improvement Y on the same planet. What if I only have improvement Y? Or Both?
Can anyone point me to a manual or guide? I can't seem to find one.