It condenses the history of the earth for 300 million years. The researchers found this stone among the ruins. It looks like muffins. Studies have proved that this kind of rock is made of bacteria, so don't try to eat it easily. After research, people found that this rock has a long history, about 300 million years ago. Therefore, this rock is of great research value to human beings. Maybe man can find out what the earth looked like 300 million years ago on this rock.

Many people have a strong thirst for knowledge about the past, and human beings are eager to know what the earth used to be like. With the development of science and technology, human beings began to look for the earth through some things or relics of the past. In fact, where life once lived, there is a high probability that it will leave clues. Once human beings find the past in these places, it is likely that they can study the past history through scientific and technological research. This ancient rock specimen may be a trace left over from history.

After experts' research, it is found that this rock is formed by the accumulation of very old shallow sea fossil bacteria. According to this discovery, several researchers went to the shallow sea of Iran for in-depth exploration. Because the shallow sea in this place is farther than the water system, it is easier to find more ancient rock samples here.

Later, researchers found that there were ancient silicate particles and dust here, which proved that there was dust in the earth's atmosphere. Dust is not only harmful to nature, but also helpful to the development and growth of living things.