No matter how much science advances, some things are becoming a thorn in the side of scientists0 once a year Eggs Puts Rock poses a challenge to Chinese scientists.

In the mountains of Gandang in southwestern China This seems amazing. Geologists, researchers, and natives have been studying for decades but have not been able to find the real thing.

The barn of this mountain is located in Guizhou ProvinceOn his stone walls Stone eggs once every 30 years Emphasizes.

The spawning peak is about 6 m (20 ft) wide and 20 m (65 ft) long.

It is very small compared to the size of the whole hill. Once in 30 years a small hill lays a stone on its side.

When the stone egg comes out of the hill, it falls to the ground. This stone is an egg-laying phenomenon Locals say it has been going on for hundreds of years.

They have been around since childhood Eggs Many people go to visit this place and try to find the fallen stone eggs after they have grown enough.

Each of the eggs they find is 20 to 60 centimeters (7 to 24 inches) in size and is dark. Have a blue colorThey are almost delicate, and after being cleaned and polished, they reflect sunlight at certain angles.