What qualities have made these persons great?

Which countrys was located along the great lakes st. lawerence river and Mississippi river? What type of branching pattern does a black spruce have? How tall was the Cape Hatteras Lighthouse? Why are there height restrictions on roller coasters? How many rooms has the allure of the seas? Whose nickname is jackal of Kremlin? Where are the Terminus locations for the English Channel tunnel? What is the dead load on the tower bridge? What are the forty two rivers in Maryland? What must twain sacrifice in return for an understanding of the river in the life on the Mississippi? How do you beat corporal spice pilot in the Hollywood rising star game? Why do beaches form? What ships were called greyhounds of the seas? Why are ocean currents important to coastal regions? How big is the Antarctic desert in kilometers? How do waves affect the ocean floor? What river drains all of the land between the Rocky and Appalachian Mountains? Is abigals wall the other name for yigaels wall? What are the similarities between the pacific and The Atlantic ocean? Which city is Toronto Victoria island rocky mountains?

What qualities have made these persons great?