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Crime scene evidence can include strands of human hair, an unidentified animal pelt, or animal hair on the ground near a suspected poaching. Hairs that look alike with the naked eye can become distinctly different when viewed under the microscope. In this lesson, students will use the microscope to draw and describe the structure of hair from classmates and other mammal species. Based on observations, they will use reference materials to compare similarities and differences in the hair. Finally, they will determine how hair can be used as evidence for a crime. This free selection includes reproducible instructional materials, the Table of Contents, Introduction, and Index.