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Hace 3 días · 1885: John Kemp Starley invents the modern safety bicycle. 1886: Carl Gassner invents the zinc–carbon battery, the first dry cell battery, making portable electronics practical. 1886: Charles Martin Hall and independently Paul Héroult invent the Hall–Héroult process for economically producing aluminum in 1886.
Hace 5 días · The 19th century began on 1 January 1801 (represented by the Roman numerals MDCCCI), and ended on 31 December 1900 (MCM). The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas.
Hace 2 días · The Tower of London, officially His Majesty's Royal Palace and Fortress of the Tower of London, is a historic castle on the north bank of the River Thames in central London, England.
Hace 2 días · Map of the departments of Puerto Rico during Spanish provincial times (1886). The history of Puerto Rico began with the settlement of the Ortoiroid people before 430 BC. At the time of Christopher Columbus 's arrival in the New World in 1493, the dominant indigenous culture was that of the Taínos.
Hace 3 días · Ulysses S. Grant (born April 27, 1822, Point Pleasant, Ohio, U.S.—died July 23, 1885, Mount McGregor, New York) was a U.S. general, commander of the Union armies during the late years (1864–65) of the American Civil War, and the 18th president of the United States (1869–77).
Hace 2 días · An epidemic is the rapid spread of disease to a large number of people in a given population within a short period of time; in meningococcal infections, an attack rate in excess of 15 cases per 100,000 people for two consecutive weeks is considered an epidemic. [1] .
Hace 2 días · The UK took a strong stand against Communist expansion after 1945, playing a major role in the Cold War and the formation of NATO as an anti-Soviet military alliance with West Germany, France, the United States, Italy, Canada and smaller countries. NATO remains a powerful military coalition.
