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18 minute video on the biology of skin color.

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Kay - saw your post and thought you'd be interested in the new set of scientific teaching collection videos we've (NMAH) posted on YouTube. We are in the middle creating a website for these videos, and we'll be adding more over the next year or so. http://www.youtube.com/user/SmithsonianAmHistory?ob=0&feature=results_main

This is a very interesting and unusual idea. Historians at Stanford have collected very specific and detailed information about historical events within short time frames and then produced graphic representations of these events that you can play over maps. It's very precise and perhaps too detailed for many high school level students to make sense of, however some of them helped show how historical phenomena occurred. Particularly chilling was the graphic showing slave purchases in the Rio slave market in the mid-C19th; you can see individual children being bought at specific times by specific people.