Mary J Allen was 11 years old when Charles Darwin publishes On the Origin of Species. Charles Robert Darwin, was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution. He established that all species of life have descended over time from common ancestors and, in a joint publication with Alfred Russel Wallace, introduced his scientific theory that this branching pattern of evolution resulted from a process that he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding.
Mary J Allen was 14 years old when U.S. President Abraham Lincoln issued the Emancipation Proclamation, declaring the freedom of all slaves in Confederate territory by January 1, 1863. Abraham Lincoln was an American statesman and lawyer who served as the 16th President of the United States from March 1861 until his assassination in April 1865. Lincoln led the United States through the American Civil War—its bloodiest war and perhaps its greatest moral, constitutional, and political crisis. In doing so, he preserved the Union, abolished slavery, strengthened the federal government, and modernized the economy.
Mary J Allen was 29 years old when Thomas Edison announces his invention of the phonograph, a machine that can record and play sound. Thomas Alva Edison was an American inventor and businessman, who has been described as America's greatest inventor. He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and the long-lasting, practical electric light bulb. Dubbed "The Wizard of Menlo Park", he was one of the first inventors to apply the principles of mass production and large-scale teamwork to the process of invention, and is often credited with the creation of the first industrial research laboratory.
Mary J Allen was 41 years old when The Eiffel Tower is officially opened. The Eiffel Tower is a wrought iron lattice tower on the Champ de Mars in Paris, France. It is named after the engineer Gustave Eiffel, whose company designed and built the tower.