Chronas - Interactive World History Site

For teachers of World History, Chronas (combination of Chronos and Atlas) is a relatively new site that lets you use a time slider at the bottom of the screen to see how the world looked at just about any given date during the past 2000 years. If you click on the countries, regions or empires shown, it shows you the corresponding Wikipedia entry.

You can explore various sets of data to find things like sunburst visualizations of population demographics according to year. You can also turn on markers for cities, battles, artifacts, and famous people. Each marker is interactive. Click the marker to be taken to a Wikipedia entry.

The site is still being perfected with future enhancements planned but in its current state, is an excellent resource. Here is a brief video with the basics of using the site: