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Beginning of the 20th century
Beginning of the 20th century -
The theory of relativity
Albert Einstein determined that the eyes of fishermen were different from those of observers, and that the speed of light was independent of the movement of the observers. This is the theory of special relativity. -
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World war 1
World War I, an international conflict that in 1914–18 embroiled most of the nations of Europe along with Russia, the United States, the Middle East, and other regions. The war pitted the Central Powers—mainly Germany, Austria-Hungary, and Turkey—against the Allies—mainly France, Great Britain, Russia, Italy, Japan, and, from 1917, the United States. It ended with the defeat of the Central Powers. The war was virtually unprecedented in the slaughter, carnage, and destruction it caused. -
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Astronomical theory of climate change
aims to explain the climatic variations occurring with quasi-periodicities lying between tens and hundreds of thousands of years. Such variations are recorded in deep-sea sediments, in ice sheets and in continental archives. -
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Discovery of the neutron
The physicist James Chadwick conducted an experiment in which he bombarded Beryllium with alpha particles from the natural radioactive decay of Polonium. The resulting radiation showed high penetration through a lead shield, which could not be explained via the particles known at that time. -
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Nazi Holocaust
The Holocaust was Nazi Germany’s deliberate, organized, state-sponsored persecution and genocide of European Jews. During the war, the Nazi regime and their collaborators systematically murdered over six million Jewish people. -
Vietnam war
Another of the most important episodes of the 20th century falls on the Vietnam War, a country divided by communism from the north and capitalism from the south. This confrontation continued for sixteen years until the defeat of the Westerners during the famous Fall of Saigon, which resulted in a generation of traumatized and pessimistic Americans whose consequences would be reflected, especially, in the culture and society of the 1970s. -
March on Washington
Although slavery was abolished in the United States, racial gaps continued in a country in which discrimination lay latent both in the workplace and in the social and economic spheres.
What is considered the civil rights movement in the United States would begin in 1955 and end in 1968 with the assassination of Martin Luther King, who on August 28, 1963 would deliver the famous "I Have a Dream" speech in front of 200,000 assembled attendees. in the Lincoln Building in the city of Washington -
The apolo
The Apollo 11 crew was sent to the moon on July 16, 1969 and managed to reach the surface of the satellite on July 20 of the same year. Astronaut Neil M. Armstrong was the first human being to set foot on the moon, specifically the area known as the Sea of Tranquility. The event, broadcast around the world, marked a before and after in space exploration and became the most important milestone for science and technology in all of history. -
End of the 20th century
At the end of the 20th century, though still ruled by a communist party, China's economic system had largely transformed to capitalism. The end of colonialism led to the independence of many African and Asian countries. During the Cold War, many of these aligned with the United States, the USSR, or China for defense.