This site which is run by Christopher Scotese, one of the main names in the study of how Earth's contintental arrangement has changed through time. You can play with paleoglobes and explore other aspects of what I guess might best be called paleogeography. It's things like this that make me occasionally miss the world of paleo.
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Dang! I wanted a Paleo-Globe in 6th grade! This is mighty cool, Mr. Riddle - thanks.