Soun Vannithone

In 1793, William Smith, the orphan son of a village blacksmith, made a startling discovery that was to turn the science of geology on its head. While surveying the route for a canal near Bath, he noticed that the fossils found in one layer of the rocks he was excavating were very different from those found in another. And out of that realization came an epiphany: that by following these fossils one could trace layers of rocks as they dipped, rose...