Sarah has the coolest job: Space Archaeologist.She uses satellites to find undiscovered sites buried deep beneath the ground. But the real interesting stuff is what we can learn about ourselves from studying our past.This is… A Bit of Optimism. Watch Sarah's first TED Talk: https://www.youtube.com/watch?v=YFC5CwZVCEw&themeRefresh=1Watch Egypt's Lost Cities on the BBC: https://www.bbc.co.uk/programmes/b011pwms