Ichnology is a term that refers to the science of fossils and their traces. Synonyms for this term include paleontology, which focuses on the study of ancient life forms, and taphonomy, which studies how organisms become fossilized. Another synonym for ichnology is paleoichnology, which is the study of trace fossils, such as footprints or burrows, left behind by extinct organisms. Other terms related to ichnology include bioturbation, which refers to the disturbance of sediment by living organisms, and ichnofacies, which categorizes the types of trace fossils found in a particular sedimentary environment. The study of ichnology is useful in understanding how ancient organisms interacted with their environment and how they evolved over time.