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As part of the act of perception, humans assemble, arrange, and manipulate incoming sensory information so as to build a dynamic, constantly updated model of the outside world.The survival value of such a model lies in the fact that it functions as a template against which to match new experiences, so as to rapidly identify anything anomalous that might be life-threatening.Find it.”Christopher Latham Sholes and Carlos Glidden took their invention to arms manufacturer Remington just when that company’s production lines were running down after the end of the American Civil War.A quick retool turned Remington into the world’s first typewriter manufacturer.By 1066 the Normans had put the loop on each side of a horse and invented the stirrup.With their feet thus firmly anchored, at the Battle of Hastings that year Norman knights hit opposing English foot soldiers with their lances and the full weight of the horse without being unseated by the shock of the encounter.
Radiocarbon is not used to date the age of rocks or to determine the age of the earth.
Founded in 2002 by Nobel Laureate Carl Wieman, the Ph ET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations.
Ph ET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery.
(Top, left to right) Mid-Acheulean bifacial hand ax and Acheulean banded-flint hand ax. (Bottom, left to right) Mousterian bifacial hand ax, scraper, and bifacial point.
tiny geometric clay models, used to represent sheep and grain, were kept in clay envelopes, to be used as inventory tallies or else to represent goods during barter.