- Brooklyn Park, Minnesota (Wikipedia)
Brooklyn Park is a suburban city on the west bank of the Mississippi River, upstream from (north of) downtown Minneapolis in northern Hennepin County. It is the sixth-largest city in the U.S. state of Minnesota. The population was 86,478 at the 2020 census. The city still has undeveloped land and farms, including the historic Eidem Homestead, a 1900s working farm that is a popular tourist attraction for families and school field trips. Brooklyn Park is considered both a second- and third-tier suburb of Minneapolis, because much of the land north of 85th Avenue was developed after 2000.
- General relativity (Wikipedia)
General relativity, also known as the general theory of relativity and Einstein’s theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General relativity generalizes special relativity and refines Newton’s law of universal gravitation, providing a unified description of gravity as a geometric property of space and time or four-dimensional spacetime. In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of second order partial differential equations.