New research knocked advanced theory of the Earth

After Charles Darwin's time, scientists have assumed that the solid earth can be, expanding or narrowing. This was the prevailing belief, until scientists developed the theory of plate tectonics, which explained the large-scale motions of the Earth, the lithosphere, or outer shell. Even with the adoption of plate tectonics half a century ago, some Earth and space scientists continue to speculate on Earth is possible expansion or contraction on various scientific grounds. Now, a new NASA study, published recently in Geophysical Research Letters, has essentially laid this argument to rest. Using footage of space measurement tools and new data calculation method, the team found a statistically significant expansion of the solid Earth. So why should we care if Mother Nature is growing? After all, the Earth is constantly changing shape. Tectonic forces, such as earthquakes and volcanic eruptions, click the mountains above, and erosion and landslides wear them down. In addition, large-scale climate events such as El Nino and La Nina redistribute vast amounts of water from the earth, ocean, atmosphere and land. Any significant change in the radius of the Earth will change our understanding of the physical processes of the world, and is the basis for this branch of science called geodesy, which seeks to measure Earth's shape and gravitational field, and how they change over time. Enter an international team of scientists led by Xiaoping Wu of NASA, Jet Propulsion Laboratory, Pasadena, California., Including participants from the Institut National was, Champs-sur-Marne in France, and Delft University of Technology in the Netherlands. Command set, to independently assess the accuracy of the International Terrestrial origin and shed new light on the Earth expansion / contraction theory. The result? Scientists estimated the average change in the radius of the Earth to be 0.004 inches (0.1 mm) per year, or about the thickness of a human hair, the rates are considered statistically significant. "Our study is an independent confirmation that the solid Earth is not getting bigger, now, in the current measurement uncertainty", said Wu. —Science Daily

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