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.

Fossils are a peek into the past, giving us a glimpse of the world as it was millions of years ago. They are a valuable tool for scientists and researchers, helping them to understand the evolution of life on earth.

In conclusion, fossils are a fascinating subject that can teach us a lot about the history of our planet. Whether you're a scientist, a student, or just someone with an interest in the natural world, fossils are a topic worth exploring.