Mining is unlocked once the Mining Settlement card is researched.
v2.0 and AfterEdit
Mining now revolves around Followers mining ore, not gold like in previous versions of the game.
Mining used be be discovered through the Mining Technology Card which was gained automatically upon reaching the Expansion Period. The Science Card (No. 35) required 2 Coal, 3 Pick Axe, 1 Oak to unlock.
The card allo