This interactive CD-ROM allows students to explore the discoveries of some of the most important concepts in biology. In the Interactive Investigations mode, students retrace the steps of scientists' experiments and discoveries using the scientific process as a road map. An Investigator's Notepad allows students to track their progress through each investigation, pose new questions to pursue, or initiate a discussion with the instructor or other students via an Internet connection. Concept Tutorials provide students with essential background information in general biology for the course and the investigations.