" Little by little, over more than two centuries, the local stories told by rocks in all parts of the world have been stitched together into a great global tapestry - the geologic timescale. This "map" of Deep Time represents one of the great intellectual achievements of humanity, arduously constructed by stratigraphers, paleontologists, geochemists, and geochronologists from many cultures and faiths. It is still a work in progress to which details are constantly being added and finer and finer calibrations being made. "

― , Timefulness: How Thinking Like a Geologist Can Help Save the World