Fossils are the remains of plants and animals that lived millions of years ago and have since turned to stone. These fossils can tell us a great deal about life on earth many millions of years ago. When an animal died, its body sank to the bottom of the water and gradually layers of sand or silt were deposited over it. Over a period of thousands of years, the silt turned to stone and so did the remains of the animal which were preserved in it. In this way, the fossils of many animals and plants were formed.

Fossils are not only found in the form of bones, but also in the form of coal. Millions of years ago, whole forests sank down, were covered, and slowly petrified. These ancient tree trunks are now coal. Among the coal that is found in coal mines, there are often numerous animal fossils as well.

Studying fossils can help us trace the history of life on earth. By examining fossils, we can learn about the evolution of different species, the climate of the past, and even the geological history of the earth.

Fossils are a window into the past, and they allow us to explore the mysteries of life on earth. By studying fossils, we can gain a deeper understanding of the world around us and our place in it.