On the slopes of Mount Boron in the French city of Nice, there are traces of an old stone wall made of pebbles dating back nearly four hundred thousand years. The wall suggests a hut, a purpose built structure, which makes it the oldest form of architecture yet discovered. On the cave walls of Liang Metanduno, on the island of Muna, in the southeast provinces of Indonesia, two hand prints are stenciled in paint. These prints are over sixty thousand…