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According to Denis Hayes, the first Earth Day 1970 organizer and current Board Chair Emeritus of Earthday.org, Earth Day is now "the largest secular day of protest in the world, and more than a billion people participate in Earth Day actions every year." [36] By far the largest source of funding for the first Earth Day was organized labor.
Plato (428/427 BC – 348/347 BC) is important in the history of mathematics for inspiring and guiding others. [50] His Platonic Academy, in Athens, became the mathematical center of the world in the 4th century BC, and it was from this school that the leading mathematicians of the day, such as Eudoxus of Cnidus (c. 390 - c. 340 BC), came. [51]
Geometry (from the Ancient Greek: γεωμετρία; geo-"earth", -metron "measurement") arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre-modern mathematics, the other being the study of numbers . Classic geometry was focused in compass and straightedge constructions.
Historical earthquakes is a list of significant earthquakes known to have occurred prior to the early 20th century. As the events listed here occurred before routine instrumental recordings — later followed by discoveries of Earth's tectonic plates, [1] seismotomography imaging technique, [2] observations using space satellites from outer space, [3] artificial intelligence (AI)-based ...
The early history is of the gradual replacement during the middle of the eighteenth century of a traditional method of oral examination by written papers, with a simultaneous switch in emphasis from Latin disputation to mathematical questions. That is, all degree candidates were expected to show at least competence in mathematics.
As a result of his efforts, the first "Earth Day" demonstration in the U.S. took place on The University of Michigan campus in March 1970, which was followed by similar events across the country. [6] In the spring of 1970—along with a federal proclamation from U.S. Sen. Gaylord Nelson—the first Earth Day was held nationwide. [7]
The process of unification might be seen as helping to define what constitutes mathematics as a discipline. For example, mechanics and mathematical analysis were commonly combined into one subject during the 18th century, united by the differential equation concept; while algebra and geometry were considered largely distinct.
The Earth's outer core is liquid, but it is liquid metal, not rock. [259] The Amazon rainforest does not provide 20% of Earth's oxygen. This is a misinterpretation of a 2010 study which found that approximately 34% of photosynthesis by terrestrial plants occurs in tropical rainforests (so the Amazon rainforest would account for approximately ...