Explore

Exploring is a way for a province to grow. In order to explore, a province must have the acres available in their explore pool as well as meet the following the conditions:
*At least 50% of their existing acres must be built upon or undergoing construction.
*Provinces can not explore more than their current acres at once.
*During war, exploration costs increase by 500% during war and wither 500% or 250% in end of war cease-fire (for provinces above and below kingdom median size respectively , including incoming explored acres).
=== Explore Pool ===
The Explore Pool is the stock of unexplored land that your province can use to explore. It starts at 200 acres and grows by 2 acres a tick up to 1000 acres. Acres can be aided to take a province's explore pool above 1000 acres and the pool is reset to 2500 acres if it is above this at the end of each utopian month. 
Once a province's explore pool reaches 1000 acres the bonus acres awarded for winning a war are automatically exploredhttp://forums.utopia-game.com/showthread.php?640423-Age-107-Final-Changes. 
When a war ends, extra acres are added to every province's explore pool. The pool has a cap of 2500 acres and if a province's explore pool is above 2500 at the start of a new Utopian month resets to 2500.
Land in a provinces explore pool can be sent as aid to other provinces in the same kingdom, though 33% of the acres are lost in transit.
History of Exploration