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WorldView-3 goes into the mid-infrared wavelength, allowing you to see very subtle geological differences on the sites at a 0.4-metre resolution.

There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.

We can see every square metre of the planet on Google Earth. But there is no substitute for that sensory experience of going out into the world and discovering things for yourself.

The world map looks smaller than ever before.

Our eyes only see the big dimensions, but beyond those there are others that escape detection because they are so small.

The eye of a human being is a microscope, which makes the world seem bigger than it really is.

As I get older, I get smaller. I see other parts of the world I didn't see before. Other points of view. I see outside myself more.

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.

Some people look at big things, and other people look at very small things, but in a sense, we're all trying to understand the world around us.