Charts & Graphs time It Took... ...ten days for the Pony Express to deliver a letter and 0.016 seconds for the atomic bomb to explode. View
Charts & Graphs communication Marginalized Notes in manuscripts and colophons made by medieval scribes and copyists. View
Charts & Graphs epidemic Flu Fallout A majority of the estimated 675,000 American deaths from the influenza pandemic of 1918–19 occurred during the second wave, which swept the country throughout the fall of 1918. View