Fossils are often the only evidence that a region once had a face entirely different from its current state. Scientists rely on these discoveries to reconstruct the geological history of an area.
Arid deserts today can hold the remains of sea animals, while mountain peaks can contain shells of creatures that once lived on the ocean floor. Such discoveries reveal the drastic changes that landscapes have undergone over millions of years.
By studying bone remains and rock layers, scientists piece together a picture of ancient environments and the life that once inhabited these regions.
