historical maps on google earth

Fantastic! I may be almost two years late to this news, but David Rumsey has been working with Google to overlay his historical maps onto Google Earth. Simply locate a historical map icon and click to map it over today's globe.

It's a little crude at the moment, but imagine the possibilities: being able to watch the evolution of our understanding of the planet change as you spin the globe with your Atlas gloves! I think I just wet myself.