The physical, natural and human sciences experienced the same impulse as technique and industry. In physics, experiences were made with light and electricity. In 1903 Ernest Rutherford discovered the radioactive elements and years later he devised a model of the atom. In 1895, Guillermo Róngten discovered X-rays.
In 1905, <u><em>Alberto Einstein</em></u> based on his mathematical studies revolutionized the conception of the cosmos with his Theory of Relativity, starting point of new investigations. This discovery meant a huge advance in science, comparable to those made by Copernicus, Kepler and Newton.
James a garfeild was the second president assinated 16 years after Abraham lincon
The cause of the increasingly tense relations between the mexican government and the american residents in texas after 1830 was mainly the increasing american immigration, that brought with it many cultural and social conflicts, since the Mexican natives became the minority in Texas, reaching only 7800 against the 30,000 English-speaking inhabitants, bringing as a consequence a conflict for the independence of Texas and then the annexation to the United States of America.
The main way in which the Marshall Plan impacted the European economy in the post-World War II era was by providing billions of dollars of aid to make sure that Europe didn't fall into the kinds of conditions that lead to tyrannical leaders.
