What do paleontologists, dinosaur tracks, and the nature of science have in common? They're combined here in an inquiry activity where students use methods of observation and inference to devise evidence-based explanations for the data they collect about dinosaur tracks, much like the methods used by paleontologists. Students then debate the plausibility of their fellow student-scientists' explanations of what dinosaurs were doing over 65 million years ago. As a result, students discover how scientific explanations are created and that these explanations are open to change based on continued testing, data gathering, and analysis. (Contains 8 figures and 5 online resources.)