empirical stability
71Timeline of solar system astronomy — Timeline of solar system astronomyAntiquity* 2137 BC, October 22 Chinese astronomers record a solar eclipse *ca. 2000 BC Chinese determine that Jupiter needs 12 years to complete one revolution of its orbit. * 2nd millennium BC earliest possible… …
72Operational definition — The operational definition of a peanut butter sandwich might be simply the result of putting peanut butter on a slice of bread with a butter knife and laying a second equally sized slice of bread on top An operational definition defines something …
73Handicap principle — The tail of peacocks, the classic example of a handicapped signal of male quality The handicap principle is a hypothesis originally proposed in 1975 by biologist Amotz Zahavi[1][2 …
74History of special relativity — The History of special relativity consists of many theoretical and empirical results of physicists like Hendrik Lorentz and Henri Poincaré, which culminated in the theory of special relativity proposed by Albert Einstein, and subsequent work of… …
75Homosexuality — Sexual orientation Orientations Asexual · Bisexual · Heterosexual · Homosexual …
76Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
77Industrial and organizational psychology — Psychology …
78Erosion prediction — Soil erosion prediction models play an important role both in meeting practical needs of soil conservation goals and in advancing the scientific understanding of soil erosion processes. They are used to help land managers choose practices to… …
79nuclear fission — fission (def. 2). [1885 90] * * * Division of a heavy atomic nucleus into two fragments of roughly equal mass, accompanied by the release of a large amount of energy, the binding energy of the subatomic particles. The energy released in the… …
80philosophical anthropology — anthropology (def. 4). * * * Study of human nature conducted by the methods of philosophy. It is concerned with questions such as the status of human beings in the universe, the purpose or meaning of human life, and whether humanity can be made… …
