Eventually, when I started studying Egyptology, I realized that seeing with my naked eyes alone wasn't enough. Because all of the sudden, in Egypt, my beach had grown from a tiny beach in Maine to one eight hundred miles long, next to the Nile.

If you look at the Nile on a map of Egypt, you don't think it has moved very much, but the river is very violent and has moved over time.

What we did is we used NASA topography data to map out the landscape, very subtle changes. We started to be able to see where the Nile used to flow.

Itjtawy was ancient Egypt's capital for over four hundred years, at a period of time called the Middle Kingdom about four thousand years ago. The site is located in the Faiyum of Egypt, and the site is really important because in the Middle Kingdom there was this great renaissance for ancient Egyptian art, architecture and religion.

I can't tell you the number of times I've been walking over an archaeological site. And you can't see anything on the ground, and pull back hundreds of miles in space, and all of a sudden you can see streets and roads and houses and even pyramids.

You just pull back for hundreds of miles using the satellite imagery, and all of a sudden this invisible world become visible. You're actually able to see settlements and tombs - and even things like buried pyramids - that you might not otherwise be able to see.