Fossils provide direct evidence of organisms and ecosystems that existed throughout Earth's history. By examining preserved anatomy, geological context, and similarities between organisms, paleontologists can investigate how life evolved, adapted, and responded to changing environments.

The Fossil Studies section uses individual fossils and evolutionary transitions as scientific case studies. Rather than simply describing extinct organisms, each study begins with a question, examines available fossil evidence, and analyzes what that evidence can tell us about vertebrate evolution. Together, these investigations demonstrate how individual discoveries contribute to our broader understanding of the history of life.

Anatomy: What structures are preserved?

Fossils can preserve bones, teeth, shells, impressions, tracks, and other traces of ancient life. Studying these structures allows paleontologists to reconstruct an organism's anatomy and investigate features related to movement, feeding, respiration, and other biological functions. Comparisons with other extinct and living organisms can provide further clues about how these structures functioned.

Evolution: Where does the organism fit?

Fossils allow scientists to compare anatomical characteristics across different organisms and periods of geological time. Shared and derived characteristics can provide evidence of evolutionary relationships, while transitional fossils can preserve combinations of features that help document major evolutionary changes. These comparisons contribute to our understanding of how vertebrate groups originated and diversified.

Environment: What was its world like?

A fossil is also evidence of the environment in which an organism lived. The surrounding rock, sediments, associated fossils, and geological setting can provide information about ancient habitats and ecosystems. By combining these sources of evidence, paleontologists can investigate factors such as climate, habitat, diet, ecological interactions, and environmental change.