Cosmos details how the full range of satellite technology is used to locate ruins not seen for thousands of years. Most of the clues are in visible light and therefore seen from any source, Including the pictures used by Google Earth. Google Earth’s satellite pics are up to 2 years old and normally considered a weakness as nothing recent is viewed. This weakness disappears when trying to find ruins that may have been built 2000 BC, well within Google Earth’s capability. A very interesting article. More …