Geography is a science about how our planet works and how people live on it. Over the millennia, humanity's view of the Earth has changed. In ancient times, people believed that the Earth is flat and rests on elephants. Today, this representation of distant ancestors makes us smile. Do we know our planet well? This kni ha convincingly demonstrates: no! Who created the giant drawings on the Nazca plateau and elven circles? Why do stones moan and sands sing? What is the nature of mirages and ball lightning?