On March 29, 1900, Louis Bachelier successfully defended his doctoral thesis at the University of Paris. It was breathtakingly innovative and complex, so much so that it would take decades for his ...

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Emily Day's family vacation nearly collapses when FlightHub’s system assigns random passport numbers to their tickets, ...

Emily Day’s family vacation nearly collapsed when FlightHub’s system assigned random passport numbers to their tickets, which forced them to buy new flights. Why won’t the airline refund the tickets ...