Neolithic
It ended when metal tools became widespread. The Neolithic is a progression of behavioral and cultural characteristics and changes, including the use of wild and domestic crops, the beginning of the Neolithic culture is considered to be in the Levant about 10, 200–8800 BC. It developed directly from the Epipaleolithic Natufian culture in the region, whose people pioneered the use of wild cereals, which evolved into true farming. The Natufian period was between 12,000 and 10,200 BC, and the so-called proto-Neolithic is now included in the Pre-Pottery Neolithic between 10,200 and 8800 BC. By 10, 200–8800 BC, farming communities arose in the Levant and spread to Asia Minor, North Africa, Mesopotamia is the site of the earliest developments of the Neolithic Revolution from around 10,000 BC. Early Neolithic farming was limited to a range of plants, both wild and domesticated, which included einkorn wheat and spelt, and the keeping of dogs, sheep. By about 6900–6400 BC, it included domesticated cattle and pigs, the establishment of permanently or seasonally inhabited settlements, not all of these cultural elements characteristic of the Neolithic appeared everywhere in the same order, the earliest farming societies in the Near East did not use pottery.
Early Japanese societies and other East Asian cultures used pottery before developing agriculture, unlike the Paleolithic, when more than one human species existed, only one human species reached the Neolithic. The term Neolithic derives from the Greek νέος néos, new and λίθος líthos, the term was invented by Sir John Lubbock in 1865 as a refinement of the three-age system. In the Middle East, cultures identified as Neolithic began appearing in the 10th millennium BC, early development occurred in the Levant and from there spread eastwards and westwards. Neolithic cultures are attested in southeastern Anatolia and northern Mesopotamia by around 8000 BC. The total excavated area is more than 1,200 square yards, the Neolithic 1 period began roughly 10,000 years ago in the Levant. A temple area in southeastern Turkey at Göbekli Tepe dated around 9500 BC may be regarded as the beginning of the period. This site was developed by nomadic tribes, evidenced by the lack of permanent housing in the vicinity.
At least seven stone circles, covering 25 acres, contain limestone pillars carved with animals, Stone tools were used by perhaps as many as hundreds of people to create the pillars, which might have supported roofs. Other early PPNA sites dating to around 9500–9000 BC have been found in Jericho, Gilgal in the Jordan Valley, the start of Neolithic 1 overlaps the Tahunian and Heavy Neolithic periods to some degree. The major advance of Neolithic 1 was true farming, in the proto-Neolithic Natufian cultures, wild cereals were harvested, and perhaps early seed selection and re-seeding occurred. The grain was ground into flour, emmer wheat was domesticated, and animals were herded and domesticated
Homo
The genus is between 2 and 3 million years old, taken to emerge with the appearance of Homo habilis. It is derived from the genus Australopithecus, which itself had previously split from the lineage of Pan, Homo is the only genus assigned to the subtribe Hominina which, with the subtribes Australopithecina and Panina, comprise the tribe Hominini. All species of the genus Homo plus those species of the australopithecines that arose after the split from Pan are called hominins, Homo erectus appeared about two million years ago in East Africa and, in several early migrations, it spread throughout Africa and Eurasia. It was likely the first hominin to live in a hunter-gatherer society, the subspecies Homo sapiens sapiens or anatomically modern humans emerged about 200,000 years ago in East Africa. DNA analysis provides evidence of interbreeding between archaic and modern humans. See Hominidae for an overview of taxonomy, the Latin noun homō means human being or man in the generic sense of human being, mankind.
The binomial name Homo sapiens was coined by Carl Linnaeus, names for other species of the genus were introduced beginning in the second half of the 19th century. Even today, the genus Homo has not been properly defined, since the early human fossil record began to slowly emerge from the earth, the boundaries and definitions of the genus Homo have been poorly defined and constantly in flux. Because there was no reason to think it would ever have any additional members, the discovery of Neanderthal brought the first addition. The genus Homo was given its name to suggest that its member species can be classified as human. Many such names are now dubbed as synonyms with Homo, including Pithecanthropus, Sinanthropus, Africanthropus, Atlanthropus, classifying the genus Homo into species and subspecies is subject to incomplete information and remains poorly done. Some recently extinct species in the genus Homo are only recently discovered, john Edward Gray was an early advocate of classifying taxa by designating tribes and families.
Several species, including Australopithecus garhi, Australopithecus sediba, Australopithecus africanus and these species have morphological features that align them with Homo, but there is no consensus as to which gave rise to Homo. The advent of Homo was traditionally taken to coincide with the first use of stone tools, the emergence of Homo coincides roughly with the onset of Quaternary glaciation, the beginning of the current ice age. A fossil mandible fragment dated to 2.8 million years ago which may represent a stage between Australopithecus and Homo was discovered in 2015 in Afar, Ethiopia. Some authors would push the development of Homo past 3 Mya, the most salient physiological development between the earlier australopithecine species and Homo is the increase in cranial capacity, from about 450 cm3 in A. garhi to 600 cm3 in H. habilis. Within the genus Homo, cranial capacity again doubled from H. habilis through Homo ergaster or H. erectus to Homo heidelbergensis by 0.6 million years ago, the cranial capacity of H. heidelbergensis overlaps with the range found in modern humans.
Homo erectus has often been assumed to have developed anagenetically from Homo habilis from about 2 million years ago
The Washington Post
The Washington Post is an American daily newspaper. It is the most widely circulated newspaper published in Washington, D. C. and was founded on December 6,1877 and its current slogan is Democracy Dies in Darkness. Located in the city of the United States, the newspaper has a particular emphasis on national politics. Daily editions are printed for the District of Columbia, the newspaper is published as a broadsheet, with photographs printed both in color and in black and white. The newspaper has won 47 Pulitzer Prizes and this includes six separate Pulitzers awarded in 2008, the second-highest number ever awarded to a single newspaper in one year, second only to The New York Times seven awards in 2002. Post journalists have received 18 Nieman Fellowships and 368 White House News Photographers Association awards, in years since, its investigations have led to increased review of the Walter Reed Army Medical Center. In 2013, its owners, the Graham family, sold the newspaper to billionaire entrepreneur.
The newspaper is owned by Nash Holdings LLC, a holding company Bezos created for the acquisition, the Washington Post is generally regarded as one of the leading daily American newspapers, along with The New York Times and The Wall Street Journal. The Post has distinguished itself through its reporting on the workings of the White House, Congress. It is one of the two daily broadsheets published in Washington D. C. the other being its smaller rival The Washington Times, unlike The New York Times and The Wall Street Journal, The Washington Post does not print an edition for distribution away from the East Coast. In 2009, the newspaper ceased publication of its National Weekly Edition, the majority of its newsprint readership is in District of Columbia and its suburbs in Maryland and Northern Virginia. The Sunday Style section differs slightly from the weekday Style section, it is in a tabloid format, and it houses the reader-written humor contest The Style Invitational. Additional weekly sections appear on weekdays, Health & Science on Tuesday, Food on Wednesday, Local Living on Thursday, the latter two are in a tabloid format.
In November 2009, it announced the closure of its U. S. regional bureaus—Chicago, Los Angeles and New York—as part of a focus on. political stories. The newspaper has bureaus in Maryland and Virginia. While its circulation has been slipping, it has one of the highest market-penetration rates of any metropolitan news daily, for many decades, the Post had its main office at 1150 15th Street NW. This real estate remained with Graham Holdings when the newspaper was sold to Jeff Bezos Nash Holdings in 2013, Graham Holdings sold 1150 15th Street for US$159 million in November 2013. The Washington Post continued to lease space at 1150 L Street NW, in May 2014, The Washington Post leased the west tower of One Franklin Square, a high-rise building at 1301 K Street NW in Washington, D. C
Knapping
The original Germanic term knopp meant strike, shape, or work, so it could theoretically have referred equally well to making a statue or dice. Modern usage is specific, referring almost exclusively to the hand-tool pressure-flaking process pictured. Flintknapping or knapping is done in a variety of ways depending on the purpose of the final product, for stone tools and flintlock strikers, chert is worked using a fabricator such as a hammerstone to remove lithic flakes from a nucleus or core of tool stone. Stone tools can be refined using wood, bone. For building work a hammer or pick is used to split chert nodules supported on the lap, often the chert nodule will be split in half to create two cherts with a flat circular face for use in walls constructed of lime. More sophisticated knapping is employed to produce almost perfect cubes which are used as bricks, there are many different methods of shaping stone into useful tools. Early knappers could have used hammers made of wood or antler to shape stone tools.
The factors that contribute to the results are varied, but the EPA indeed influences many attributes, such as length, thickness. Hard hammer techniques are used to remove large flakes of stone, early knappers and hobbyists replicating their methods often use cobbles of very hard stone, such as quartzite. This technique can be used by flintknappers to remove broad flakes that can be made into smaller tools and this method of manufacture is believed to have been used to make some of the earliest stone tools ever found, some of which date from over 2 million years ago. Soft hammer techniques are more precise than hard hammer methods of shaping stone, soft hammer techniques allow a knapper to shape a stone into many different kinds of cutting and projectile tools. These soft hammer techniques produce longer, thinner flakes, potentially allowing for material conservation or a lighter lithic tool kit to be carried by mobile societies, pressure flaking involves removing narrow flakes along the edge of a stone tool.
This technique is used to do detailed thinning and shaping of a stone tool. Pressure flaking involves putting an amount of force across a region on the edge of the tool. The major advantage of using soft metals rather than wood or bone is that the metal punches wear down less and are likely to break under pressure. Archaeologists usually undertake the task so that they can understand how prehistoric stone tools were made. Knapping is often learned by outdoorsmen, such as British bushcraft exponent Ray Mears, knapping gun flints, used by flintlock firearms was formerly a major industry in flint bearing locations, such as Brandon in Suffolk and the small towns of Meusnes and Couffy in France. Meusnes has a museum dedicated to the industry
Outline of prehistoric technology
The following outline is provided as an overview of and topical guide to prehistoric technology. Prehistoric technology – technology that predates recorded history, History is the study of the past using written records, it is the record itself. Anything prior to the first written accounts of history is prehistoric, including earlier technologies. About 2.5 million years before writing was developed, technology began with the earliest hominids who used tools, which they may have used to start fires, cut food. Prehistoric technology can be described as, Prehistoric – before we had written records, from the Latin word for before, prehistory is the span of time before recorded history, that is, before the invention of writing systems. Beginning of prehistoric technology – the earliest technology began before recorded history, latest prehistoric technology – the level of technology reached before true writing was introduced differed by region. Latest prehistoric technology in the Near East – cultures in the Near East achieved the development of writing first, latest prehistoric technology in the rest of the Old World, Europe and China reached Iron Age technological development before the introduction of writing there.
Stone Age – broad prehistoric period, lasting roughly 2.5 million years, during which stone was used in the manufacture of implements with a sharp edge. The period began with hominids and ended between 6000 and 2000 BCE with the advent of metalworking, Paleolithic – prehistoric period of human history distinguished by the development of the most primitive stone tools discovered, and covers roughly 99% of human technological prehistory. Lower Paleolithic – earliest subdivision of the Paleolithic or Old Stone Age and it spans the time from around 2. Ancestors of homo sapiens used stone tools as follows, Homo habilis – first homo species and it lived from approximately 2.3 to 1.4 million years ago in Africa and created stone tools called Oldowan tools. Homo ergaster – in eastern and southern Africa about 2.5 to 1.7 million years ago, it refined Oldowan tools, Homo antecessor – earliest hominid in Northern Europe. It lived from 1.2 million to 800,000 years ago, Homo heidelbergensis – lived between 600,000 and 400,000 years ago and used stone tool technology similar to the Acheulean tools used by Homo erectus.
Control of fire by early humans – European and Asian sites dating back 1.5 million years ago seem to indicate controlled use of fire by H. erectus. A northern Israel site from about 690,000 to 790,000 years ago suggests that man could light fires, burial – the act of placing a deceased person into the ground. Homo heidelbergensis – may have been the first species to bury their dead about 500,000 years ago, Middle Paleolithic period – in Europe and the Near East during which the Neanderthals lived. Their technology is mainly the Mousterian, the earliest evidence of settlement in Australia dates to around 55,000 years ago when modern humans likely crossed from Asia by island-hopping. The Bhimbetka rock shelters exhibit the earliest traces of life in India
Chimpanzee
Chimpanzees are one of the two species of the genus Pan, the other being the bonobo. Together with gorillas, they are the only exclusively African species of ape that are currently extant. Native to sub-Saharan Africa, both chimpanzees and bonobos are found in the Congo jungle. In addition, P. troglodytes is divided into four subspecies, based on genome sequencing, the two extant Pan species diverged around one million years ago. The most obvious differences are that chimpanzees are somewhat larger, more aggressive and male-dominated, while the bonobos are more gracile and their hair is typically black or brown. Males and females differ in size and appearance, both chimps and bonobos are some of the most social great apes, with social bonds occurring among individuals in large communities. Fruit is the most important component of a diet, they will eat vegetation, honey, insects. They can live over 30 years in both the wild and captivity and bonobos are equally humanitys closest living relatives.
As such, they are among the largest-brained, and most intelligent of primates, they use a variety of sophisticated tools and construct elaborate sleeping nests each night from branches and they have both been extensively studied for their learning abilities. There may even be distinctive cultures within populations, field studies of Pan troglodytes were pioneered by primatologist Jane Goodall. Both Pan species are considered to be endangered as human activities have caused declines in the populations. Threats to wild populations include poaching, habitat destruction. Several conservation and rehabilitation organisations are dedicated to the survival of Pan species in the wild, the first use of the name chimpanze is recorded in The London Magazine in 1738, glossed as meaning mockman in a language of the Angolans. The spelling chimpanzee is found in a 1758 supplement to Chambers Cyclopædia, the colloquialism chimp was most likely coined some time in the late 1870s. The common chimpanzee was named Simia troglodytes by Johann Friedrich Blumenbach in 1776, the species name troglodytes is a reference to the Troglodytae, an African people described by Greco-Roman geographers.
Blumenbach first used it in his De generis humani varietate nativa liber in 1776, the genus name Pan was first introduced by Lorenz Oken in 1816. An alternative Theranthropus was suggested by Brookes 1828 and Chimpansee by Voigt 1831, troglodytes was not available, as it had been given as the name of a genus of wren in 1809. The International Commission on Zoological Nomenclature adopted Pan as the official name of the genus in 1895
George Washington University
The George Washington University is a private research university in Washington, D. C. GW is the largest institution of education in Washington, D. C. In his will, Washington left his 50 shares in the Potomac Company to help endow the university, due to the companys financial difficulties, the funding did not materialize. The university was chartered by an act of Congress on February 9,1821 and its name was changed to Columbian University in 1873 and to the George Washington University in 1904, in honor of Washington. GWs Graduate School of Political Management is the school of applied politics in the nations capital. GWs professional schools and the Elliott School of International Affairs are consistently ranked highly in national and international college rankings lists, the Princeton Review consistently ranks GW as one of the Most Politically Active schools. Some of the graduates have gone on to high positions within both the U. S. government and foreign governments. Notable alumni include former Senate Minority Leader Harry Reid, former Secretary of State Colin Powell and he presented numerous letters to Congress and included the subject in his last will and testament.
Baptist missionary and leading minister Luther Rice raised funds to purchase a site in Washington, the first commencement in 1824 was considered an important event for the young city of Washington, D. C. In attendance were President Monroe, John C, Henry Clay, Marquis de Lafayette and other dignitaries. During the Civil War, most students left to join the Confederacy, walt Whitman was among many of the volunteers to work on the campus. Following the war, in 1873, Columbian College became the Columbian University and moved to a downtown location centered on 15th and H streets. The university moved its operations to the D. C. neighborhood of Foggy Bottom in 1912. The George Washington University, like much of Washington, D. C. traces many of its origins back to the Freemasons, the Bible that the presidents of the university use to swear an oath on upon inauguration is the Bible of Freemason George Washington. Freemasonry symbols are displayed throughout the campus including the foundation stones of many of the university buildings.
Many of the Colleges of the George Washington University stand out for their age, the Law School is the oldest law school in the District of Columbia. The School of Medicine and Health Sciences is the 11th oldest medical school in the nation, the Columbian College was founded in 1821, and is the oldest unit of the university. The Elliott School of International Affairs was formalized in 1898, the majority of the present infrastructure and financial stability at GW is due to the tenures of Presidents Cloyd Heck Marvin, Lloyd Hartman Elliott and Stephen Joel Trachtenberg
Prehistory
Prehistory means literally before history, from the Latin word for before, præ, and Greek ιστορία. Neighbouring civilisations were the first to follow, most other civilisations reached the end of prehistory during the Iron Age. The period when a culture is written about by others, but has not developed its own writing is known as the protohistory of the culture. By definition, there are no records from human prehistory. Clear techniques for dating were not well-developed until the 19th century and this article is concerned with human prehistory as defined here above. There are separate articles for the history of the Earth. However, for the race as a whole, prehistory ends when recorded history begins with the accounts of the ancient world around the 4th millennium BC. For example, in Egypt it is accepted that prehistory ended around 3200 BC, whereas in New Guinea the end of the prehistoric era is set much more recently. The three-age system is the periodization of prehistory into three consecutive time periods, named for their respective predominant tool-making technologies, Stone Age Bronze Age Iron Age.
The notion of prehistory began to surface during the Enlightenment in the work of antiquarians who used the word primitive to describe societies that existed before written records, the first use of the word prehistory in English, occurred in the Foreign Quarterly Review in 1836. The main source for prehistory is archaeology, but some scholars are beginning to more use of evidence from the natural and social sciences. This view has been articulated by advocates of deep history, human population geneticists and historical linguists are providing valuable insight for these questions. Human prehistory differs from history not only in terms of its chronology, restricted to material processes and artifacts rather than written records, prehistory is anonymous. Because of this, reference terms that use, such as Neanderthal or Iron Age are modern labels with definitions sometimes subject to debate. Palaeolithic means Old Stone Age, and begins with the first use of stone tools, the Paleolithic is the earliest period of the Stone Age.
The early part of the Palaeolithic is called the Lower Palaeolithic, evidence of control of fire by early humans during the Lower Palaeolithic Era is uncertain and has at best limited scholarly support. The most widely accepted claim is that H. erectus or H. ergaster made fires between 790,000 and 690,000 BP in a site at Bnot Yaakov Bridge, Israel. The use of fire enabled early humans to cook food, provide warmth, Early Homo sapiens originated some 200,000 years ago, ushering in the Middle Palaeolithic
History of technology
The history of technology is the history of the invention of tools and techniques and is similar to other sides of the history of humanity. Technology can refer to methods ranging from as simple as language and stone tools to the genetic engineering. Since much of technology is applied science, technical history is connected to the history of science, since technology uses resources, technical history is tightly connected to economic history. From those resources, technology produces other resources, including technological artifacts used in everyday life, technological change affects, and is affected by, a societys cultural traditions. It is a force for economic growth and a means to develop and project economic, many sociologists and anthropologists have created social theories dealing with social and cultural evolution. Some, like Lewis H. Morgan, Leslie White, morgans concept of three major stages of social evolution can be divided by technological milestones, such as fire. White argued the measure by which to judge the evolution of culture was energy, for White, the primary function of culture is to harness and control energy.
White differentiates between five stages of development, In the first, people use energy of their own muscles. In the second, they use energy of domesticated animals, in the third, they use the energy of plants. In the fourth, they learn to use the energy of natural resources, oil, in the fifth, they harness nuclear energy. White introduced a formula P=E*T, where E is a measure of energy consumed, in his own words, culture evolves as the amount of energy harnessed per capita per year is increased, or as the efficiency of the instrumental means of putting the energy to work is increased. Nikolai Kardashev extrapolated his theory, creating the Kardashev scale, which categorizes the energy use of advanced civilizations, the more information and knowledge a given society has, the more advanced it is. He identifies four stages of development, based on advances in the history of communication. In the first stage, information is passed by genes, in the second, when humans gain sentience, they can learn and pass information through by experience.
In the third, the humans start using signs and develop logic, in the fourth, they can create symbols, develop language and writing. Advancements in communications technology translates into advancements in the system and political system, distribution of wealth, social inequality. He differentiates societies based on their level of technology and economy, hunter-gatherer, simple agricultural, in economics productivity is a measure of technological progress. Productivity increases when fewer inputs are used in the production of a unit of output, another indicator of technological progress is the development of new products and services, which is necessary to offset unemployment that would otherwise result as labor inputs are reduced
History of agriculture
The history of agriculture records the domestication of plants and animals and the development and dissemination of techniques for raising them productively. Agriculture began independently in different parts of the globe, and included a range of taxa. At least eleven separate regions of the Old and New World were involved as independent centers of origin, Wild grains were collected and eaten from at least 20,000 BC. From around 9,500 BC, the eight Neolithic founder crops and einkorn wheat, hulled barley, lentils, bitter vetch, chick peas and flax were cultivated in the Levant. Rice was domesticated in China between 11,500 and 6,200 BC, followed by mung and azuki beans, pigs were domesticated in Mesopotamia around 13,000 BC, followed by sheep between 11,000 and 9,000 BC. Cattle were domesticated from the aurochs in the areas of modern Turkey. Sugarcane and some vegetables were domesticated in New Guinea around 7,000 BC. Sorghum was domesticated in the Sahel region of Africa by 5,000 BC, in the Andes of South America, the potato was domesticated between 8,000 and 5,000 BC, along with beans, llamas and guinea pigs.
Bananas were cultivated and hybridized in the period in Papua New Guinea. In Mesoamerica, wild teosinte was domesticated to maize by 4,000 BC, cotton was domesticated in Peru by 3,600 BC. Camels were domesticated late, perhaps around 3,000 BC, crop rotation, and fertilizers were introduced soon after the Neolithic Revolution and developed much further in the past 200 years, starting with the British Agricultural Revolution. The Haber-Bosch process allowed the synthesis of nitrate fertilizer on an industrial scale. Modern agriculture has raised social and environmental issues including pollution, genetically modified organisms, tariffs. In response, organic farming developed in the century as a consciously pesticide-free alternative. Scholars have developed a number of hypotheses to explain the origins of agriculture. Current models indicate that wild stands that had been harvested previously started to be planted, localised climate change is the favoured explanation for the origins of agriculture in the Levant.
When major climate change took place after the last ice age and these conditions favoured annual plants which die off in the long dry season, leaving a dormant seed or tuber. An abundance of readily storable wild grains and pulses enabled hunter-gatherers in some areas to form the first settled villages at this time, early people began altering communities of flora and fauna for their own benefit through means such as fire-stick farming and forest gardening very early
Stone Age
The Stone Age was a broad prehistoric period during which stone was widely used to make implements with an edge, a point, or a percussion surface. The period lasted roughly 3.4 million years, and ended between 8700 BCE and 2000 BCE with the advent of metalworking, bone tools were used during this period as well but are rarely preserved in the archaeological record. The Stone Age is further subdivided by the types of tools in use. According to the age and location of the current evidence, the cradle of the genus is the East African Rift System, especially toward the north in Ethiopia, where it is bordered by grasslands. The closest relative among the living primates, the genus Pan, represents a branch that continued on in the deep forest. The rift served as a conduit for movement into southern Africa and north down the Nile into North Africa and through the continuation of the rift in the Levant to the vast grasslands of Asia. The oldest indirect evidence found of stone tool use is fossilised animal bones with tool marks, the oldest stone tools were excavated from the site of Lomekwi 3 in West Turkana, northwestern Kenya, and date to 3.3 million years old.
Prior to the discovery of these Lomekwian tools, the oldest known stone tools had been found at sites at Gona, Ethiopia, on the sediments of the paleo-Awash River. All the tools come from the Busidama Formation, which lies above a disconformity, or missing layer, the oldest sites containing tools are dated to 2. 6–2.55 mya. One of the most striking circumstances about these sites is that they are from the Late Pliocene, excavators at the locality point out that. the earliest stone tool makers were skilled flintknappers. The possible reasons behind this seeming abrupt transition from the absence of tools to the presence thereof include. The species who made the Pliocene tools remains unknown, fragments of Australopithecus garhi, Australopithecus aethiopicus and Homo, possibly Homo habilis, have been found in sites near the age of the Gona tools. Innovation of the technique of smelting ore ended the Stone Age, the first most significant metal manufactured was bronze, an alloy of copper and tin, each of which was smelted separately.
The Chalcolithic by convention is the period of the Bronze Age. The Bronze Age was followed by the Iron Age, the transition out of the Stone Age occurred between 6000 BCE and 2500 BCE for much of humanity living in North Africa and Eurasia. Note the Rudna Glava mine in Serbia, Ötzi the Iceman, a mummy from about 3300 BCE carried with him a copper axe and a flint knife. In regions such as Sub-Saharan Africa, the Stone Age was followed directly by the Iron Age, the Middle East and southeastern Asian regions progressed past Stone Age technology around 6000 BCE. Europe, and the rest of Asia became post–Stone Age societies by about 4000 BCE, the proto-Inca cultures of South America continued at a Stone Age level until around 2000 BCE, when gold and silver made their entrance
