Christopher Columbus set out on August 3, 1492, to find the East by sailing west. Over the course of a few years, he convinced the king and queen of Spain to pay for his trip, promising them fame and riches in return. Columbus discovered more than he bargained forâ€”he had found a new continent.
The colonies were the birthplace of the United States and they were made up of people that came from various backgrounds seeking religious freedom, wealth, and success. Daily life for the colonists was different depending on the region in which they lived, yet they established a united nation built on freedom and the pursuit of happiness.
Alfred Wegener studied astronomy and meteorologyâ€”and was even a record-holding balloonistâ€”before he became famous for his theories on how the land and seas on Earth were formed and change. These ideas are continental drift and plate tectonics. Seeing that the continents fit together like a puzzle, Wegener proved the theory that all of Earth's continents were once connected. Although his theories weren't accepted until after his death, scientists use plate tectonics to explain volcanoes and many other changes on Earth.