He is wisest who admits he knows nothing refers to the idea that

What do the discoveries of shells used in jewelry and a huge dredged canal tell us about the indus valley civilization?

How did the cleveland massacre impact standard oil in 1872? standard oil hired all the laborers who were nearly killed during the cleveland massacre. standard oil became a monopoly in the cleveland oil market after the cleveland massacre. standard oil was bought out by other companies in the city after the cleveland massacre. standard oil closed down to avoid additional violence in the wake of the cleveland massacre.

What is the approximate distance between paris and moscow?