In this interactive, you will learn more about key chemistry-related people and events from prehistoric times to the present. The timeline targets major breakthroughs in the development of chemical science, including the discovery of key elements, as well as the birth and death dates of important contributors chemistry history. As you scroll forward and backward in time, or use a navigation bar to quickly jump to different points of chemical history, you will see the connection between chemical discoveries and other key events in human history. Clicking on a person or date will bring up more information about the selection and provide links to relevant material in the Units. Targeted for all Units 1-13.