Strange story about the 12,000-year-old stone ball

For decades scientists have been trying to understand the origin of stone balls scattered throughout the world from Frans Josef Land to New Zealand.

The number of this stone ball is the most at Costa Rika, about 300. Its age is estimated at 12 thousand years.

Scientists found that most of them are made of solid lava, even fruit made from sedimentary rocks. These balls are processed by heat-heating or cooling several times so that the top layer becomes flexible.

Currently, many balls are stolen, destroyed, or exploded by those who seek them to believe that gold is hidden. Even scientists have confirmed that, in Central America, the nobles put them in front of their homes to confirm their rank. However, it is very difficult to explain the use of balls in New Zealand or Frans Josef Land.

The number of this stone ball is the most at Costa Rika, about 300.