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Crankshaft, pistons and connecting rods for a typical internal combustion engine Marine engine crankshafts from 1942 The crankshaft is located within the engine block and held in place via main bearings which allow the crankshaft to rotate within the block. [3]
In biology, a mechanism is a system of causally interacting parts and processes that produce one or more effects. [1] Phenomena can be explained by describing their mechanisms.
Michael King Jr. was born on January 15, 1929, in Atlanta; he was the second of three children born to Michael King Sr. and Alberta King (née Williams). [6] [7] [8] Alberta's father, Adam Daniel Williams, [9] was a minister in rural Georgia, moved to Atlanta in 1893, [8] and became pastor of the Ebenezer Baptist Church in the following year. [10]
Evolution is the change in the heritable characteristics of biological populations over successive generations. [1] [2] It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successive generations. [3]
Ceres (minor-planet designation: 1 Ceres) is a dwarf planet in the middle main asteroid belt between the orbits of Mars and Jupiter.It was the first known asteroid, discovered on 1 January 1801 by Giuseppe Piazzi at Palermo Astronomical Observatory in Sicily, and announced as a new planet.
The first human inhabitants of the Japanese archipelago have been traced to the Paleolithic, around 38–39,000 years ago. [1] The Jōmon period, named after its cord-marked pottery, was followed by the Yayoi period in the first millennium BC when new inventions were introduced from Asia.