Tap the regions you think will receive it this move.
Ingredients →
Concepts Encountered
Contagious Diffusion
Spreading outward to all adjacent regions
Distance Decay
Items weaken the farther they travel
Physical Barrier
Climate zones slow or block diffusion
Intro Geography
The Columbian Exchange
After 1492 — crops, animals & ideas crossed the oceans
1
Select an Ingredient
Pick from Old or New World ingredients. Each originates in a specific region.
2
Predict the Spread
After planting, tap where you think it will spread next. Then see what actually happens.
3
Light the Dishes
Each region needs 2 ingredients. When both arrive, the regional dish lights up!
🌡️ Climate Matters: Red dashed routes are climate barriers — tropical crops crossing into cool or arid zones take one extra move. Watch how items fade as they travel farther from their origin.
Choose Your Mode
🧭
Guided
11 moves
Concept labels appear as you play. Room to explore and make mistakes.
🔥
Challenge
9 moves
Near-perfect play required. You know the concepts — prove it.