This requires level two Science (back of the lab must be rebuilt), and a Master Scientist. After you purchase level 2 Science, the lab cleans up a bit and there is a large "blackboard" on the back wall made of animal skins. Drop a Master Scientist on this board and they will proceed to write a mathematical proof. If they are correct, the purple masked master scientist will celebrate, then walk over to the mat and sit down, thinking. You can tell they are thinking by the light over their head. Wait for the light to go out, which requires an hour or two depending on the game speed. When they are no longer thinking, repeat the process with a Master Scientist. Wait again and repeat the process a third time. After the third time, the heathen will convert. The heathen will drop a piece of the necklace. Have a child pick it up.