About 10,000 years ago, what dug out many of Minnesota's "10,000 lakes"?

About 1 male in 10,000 is born with which bleeding disorder, in which the blood lacks clotting factor VIII? About 10 percent of your body mass is which simplest element? Around 1000 AD, which people reached North America and named parts of it Helluland, Markland and Vinland? About 1,000 times as many people attended which leader's 1970 Cairo funeral as attended his successor's? About 100,000 people greeted which aviator at Le Bourget airfield when he landed there in 1927? Which sea, about 1,200 miles long, has a maximum depth of almost 10,000 feet? Which country has the largest Arab population? Around 1621 William Oughtred invented which calculating device, found in engineers' shirt pockets well into the 20th ce…