Hello! I started the game yesterday for the first time ever. Got out of the Neolithic Era and chose the Olmecs as my first culture. 

The Tourism Yields bonus seems to give a massive amount of science per turn (close to x10 on my playthrough) but I have no idea if it's a bug or if it's intended. I couldn't find a way to understand what brings influence over a territory and on the science screen there is no breakdown of where the science comes from. Actually I had no idea what Tourism Yields bonus would do before I activated it... Does anyone have insights on this for me ?