Satellites scan ancient ruins so that scientists can map them without disturbing one grain of sand. Discover how some archaeologists forsake their spades and brushes in favor of examining historic sites from hundreds of miles high. Also, if you were to hunt for alien artifacts - what would you look for? Why ET might choose to send snail mail rather than a radio signal. Plus, the culture of the hardware we send into space, and roaming the Earth, the moon, and Mars the Google way. With Seth Shostak, Molly Bentley, Alice Gorman, Robin Hanson, Christopher Rose, Tiffany Montague, and Compton Tucker. This show is available through the Pacifica radio archives.