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Hace 1 día · From about 9.8 billion years of cosmic time, the universe's large-scale behavior is believed to have gradually changed for the third time in its history. Its behavior had originally been dominated by radiation (relativistic constituents such as photons and neutrinos) for the first 47,000 years, and since about 370,000 years of cosmic time, its behavior had been dominated by matter.
Hace 1 día · 1963 - Jürg Waser introduced restrained least square method, also known as regularized least squares, for crystallographic structure fitting. [162] 1964 - Dorothy Hodgkin won the Nobel Prize for Chemistry "for her determinations by X-ray techniques of the structures of important biochemical substances."
Hace 1 día · From the 1st to the 12th grade, education is compulsory. Starting in the educational year of 2012–2013, an education reform took effect to bring the compulsory education up to the end of high school. The system is commonly referred to as 4+4+4. United States.
Hace 1 día · 1894 in music, 1894 in Norwegian music – Cello Concerto and Humoresques by Antonín Dvořák. 1893 in music, 1893 in Norwegian music – Symphony No. 9 and String Quartet No. 12 by Antonín Dvořák; Symphony No. 3 by Gustav Mahler; Karelia Suite by Jean Sibelius; Death of Pyotr Ilyich Tchaikovsky, Russian composer.
Hace 1 día · The modern notion of chemical warfare emerged from the mid-19th century, with the development of modern chemistry and associated industries. The first recorded modern proposal for the use of chemical warfare was made by Lyon Playfair, Secretary of the Science and Art Department, in 1854 during the Crimean War.
