The delegates elected George Washington to preside over the Convention. 70 Delegates had been appointed by the original states to attend the Constitutional Convention, but only 55 were able to be there. Rhode Island was the only state to not send any delegates at all.
The only evidence that Alfred Wegener did not have was the mechanism that drove the Continental Drift, he had evidence to support that the continents were once <span>joined together, but did not have the means to postulate</span>
Answer: Atomic bomb
Detail:
The Soviet Union had conducted espionage concerning the United States "Manhattan Project," which was the US government's development of atomic bombs during World War II. The US tested its first atomic bomb in July, 1945, and then used two such bombs to force Japan to surrender in August, 1945.
The USA would not share its nuclear weapons technology with the USSR, even though the two nations were allies during World War II. But by 1949, the the Soviet Union had developed and tested its own atomic bomb. From that point on, an arms race truly began between the two superpowers.
No "Americans" arrived in North America. However, in 10 A.D. Vikings explored the fringes of North America. Also, Native Americans crossed over from Siberia into Alaska over a land bridge about 12,000 years ago. In 1501, Amerigo Vespucci officially discovered America but thought it was Asia so he did not dock. Then in 1592, Christopher Columbus found and docked in the Caribbean and was the first man to land on America.
Mesopotamia was home to Sumer the first urban civilization in the region, and arguably the first civilization in the world. Sumer was first permanently settled between 5,500 and 4,000 B.C.
