Ideas are the second currency unlocked in the game and are used to progress through the Civilization section of the tree. Ideas are used to purchase upgrades for each Age of Civilization. They are unlocked after obtaining the First Idea upgrade.
Overview
Ideas can be produced by tapping the brain icon, the segment of the Tech Tree containing the Civilization section (once the Stone Age has been unlocked), and the Civilization gardens.
The Beyond will be after the ''the colonization of mars''.