According to the conventional view of history, humans have only walked the Earth in our present form for some , years. Advanced civilizations appeared several thousand years ago, but much of the mechanical ingenuity we know in modern times began to develop only around the Industrial Revolution a couple hundred years ago. Oopart out-of-place artifact is a term applied to dozens of prehistoric objects found in various places around the world that seem to show a level of technological advancement incongruous with the times in which they were made. Many scientists attempt to explain them using natural phenomena. Others say such explanations ignore the mounting evidence that prehistoric civilizations possessed advanced technological knowledge that was lost throughout the ages only to be redeveloped in modern times. We will look at a variety of ooparts here ranging in purported origin from millions of years ago to merely hundreds of years ago, but all said to show advancement well ahead of their time.
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In academic, historical, and archaeological circles, A. Dates are determined by a variety of processes, including chemical analyses as in radiocarbon dating and thermoluminescence , data correlation as in dendrochronology , and a variety of other tests. See Relative Dating. Acheulean — A stone tool industry, in use from about 1. It was characterized by large bifaces, particularly hand axes.
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Also used to describe the process of genetic change within a population, as influenced by natural selection. Peaks on the landscape correspond to genotypic frequencies at which the average fitness is high, valleys to genotypic frequencies at which the average fitness is low. Also called a fitness surface. If such a behavior is even partly genetically determined, it will tend to become widespread in the population. Then, even if circumstances change such that it no longer provides any survival or reproductive advantage, the behavior will still tend to be exhibited -- unless it becomes positively disadvantageous in the new environment.