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The Gregorian calendar is the calendar used in most parts of the world. [1] [a] It went into effect in October 1582 following the papal bull Inter gravissimas issued by Pope Gregory XIII, which introduced it as a modification of, and replacement for, the Julian calendar.
Steve Russell, designer and main programmer of the initial version of Spacewar!, with a PDP-1 in 2007. During the 1950s, various computer games were created in the context of academic computer and programming research and for demonstrations of computing power, especially after the introduction later in the decade of smaller and faster computers on which programs could be created and run in ...
One radian is defined as the angle at the center of a circle in a plane that subtends an arc whose length equals the radius of the circle. [6] More generally, the magnitude in radians of a subtended angle is equal to the ratio of the arc length to the radius of the circle; that is, =, where θ is the magnitude in radians of the subtended angle, s is arc length, and r is radius.
Unlike the 260-day tzolkʼin still used today among the Maya, the Long Count was linear rather than cyclical, and kept time roughly in units of 20: 20 days made a uinal, 18 uinals (360 days) made a tun, 20 tuns made a kʼatun, and 20 kʼatuns (144,000 days or roughly 394 years) made up a bʼakʼtun. Thus, the Maya date of 8.3.2.10.15 represents ...
Great Falls is the third most populous city in the U.S. state of Montana and the county seat of Cascade County.The population was 60,442 according to the 2020 census. [4] The city covers an area of 22.9 square miles (59 km 2) [5] and is the principal city of the Great Falls, Montana, Metropolitan Statistical Area, which encompasses all of Cascade County.
Today, the most important French schools in Alexandria run by Catholic missionaries include Collège de la Mère de Dieu, Collège Notre Dame de Sion, Collège Saint Marc, Écoles des Soeurs Franciscaines (four different schools), École Girard, École Saint Gabriel, École Saint-Vincent de Paul, École Saint Joseph, École Sainte Catherine ...
Changes in temperature and ice over the last 450,000 years (Antarctic data).Life appeared on Earth between 3.8 and 3.5 billion years ago, in the form of the first cells. It was the first living organisms capable of recovering carbon from atmospheric CO2 dissolved in water and progressively enriching the atmosphere with oxygen (photosynthesis) that set in motion the dynamic cycle of water and ...
The search for survivors lasted for 19 days and ended on 13 May 2013, with a confirmed death toll of 1,134. [2] Approximately 2,500 injured people were rescued from the building. [ 4 ] It is considered to be one of the deadliest structural failures in modern human history, as well as the deadliest garment-factory disaster in history, and is the ...