In Siberia, the locals are stunned when giant balls were found in a coal mine. Dubbed as the 'Jurassic Pearls', the giant balls are believed to be signs of ancient civilization in Siberia. The height of the extremely large rocks, when photographed, reaches half the height of a fully grown man.

The balls were found 30 meters below the ground on an operational coal mine, Sereulsky in Nazarovo district of Krasnoyarsk region. The Jurassic pearls are marbles of a Siberian colossus. There were 10 giant balls discovered almost as big as a tiny human being; they are almost one meter in diameter. But what fascinates the locals is the fact that the rocks are completely round and smooth earning the name "Jurassic Pearls." Some even say that the balls change in color after the rain.

The giant balls were assembled close together giving fire to the legend that a pre-historic giant carefully placed them or it could also be due to an extraterrestrial phenomenon. Some even suggest that they could be dinosaur eggs. 

But experts are quick to refute the claims, saying the giant balls were formed due to natural processes not alien to Earth.

"The balls are formed the same way as a pearl, when a grain of sand gets into the shell and the clam tries to get rid of it. Water flowing through sedimentary rock leaves behind minerals that glue together masses of sand, mud or other particles. These concretions are very rare," Olga Yakunina of the Geology Museum of Central Siberia said in an interview with Siberian Times. As with the changing color, experts say that it is because of iron oxide present on the rocks.

The Russian expert further explained that the formation of the rocks involves a rare concentration of sand, mud and minerals shaped into a ball by natural processes that can last millions of years. The materials or sediments concentrates around a nucleus that can be a piece of shell or a fossil. Water underneath the Earth that flows through the rocks also contributes and leaves behind minerals that help glue the giant balls together. "This leads to the formation of just such a spherical shape," Dr. Yakunina said in an interview published by Daily Mail.

The "Jurassic Pearls" are now on display on the side of the road leading to the mine. They look so much like the Moqui marbles of Moui balls found in Utah.