half-spherical
81animal development — Introduction the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …
82Ionians (The) — The Ionians Malcolm Schofield THALES AND OTHERS The Greeks agreed that philosophy had begun with Thales. However they did not know much about his views.1 What survives is mostly a potent legend. Herodotus tells stories of his practical ingenuity …
83Cartesian coordinate system — Illustration of a Cartesian coordinate plane. Four points are marked and labeled with their coordinates: (2, 3) in green, (−3, 1) in red, (−1.5, −2.5) in blue, and the origin (0, 0) in purple. A Cartesian coordinate system specifies each point… …
84Pendulum — This article is about pendulums. For other uses, see Pendulum (disambiguation). Simple gravity pendulum model assumes no friction or air resistance …
85Tests of general relativity — General relativity Introduction Mathematical formulation Resources Fundamental concepts …
86Antenna measurement — techniques refers to the testing of antennas to ensure that the antenna meets specifications or simply to characterize it. Typical parameters of antennas are gain, radiation pattern, beamwidth, polarization, and impedance.The antenna pattern is… …
87Voyages of Christopher Columbus — Discovery of the Americas and Discovery of America redirect here. For other uses, see Discovery of the Americas (disambiguation). Voyages of Christopher Columbus The Four Voyages of Columbus Participants Christopher Columbus and crew …
88History of science and technology in China — Inventions …
89Myth of the Flat Earth — For mythologies involving the belief in a Flat Earth, see Flat Earth. The famous Flat Earth Flammarion engraving originates with Flammarion s 1888 L atmosphère: météorologie populaire (p. 163) …
90chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …
