Before Present in the context of Archaeology

The founding of Rome was a prehistoric event or process later greatly embellished by Roman historians and poets. Archaeological evidence indicates that Rome developed from the gradual union of several hilltop villages during the Final Bronze Age or early Iron Age. Prehistoric habitation of the Italian Peninsula occurred by 48,000 years ago, with the area of Rome being settled by around 1600 BC. Some evidence on the Capitoline Hill possibly dates as early as c. 1700 BC and the nearby valley that later housed the Roman Forum had a developed necropolis by at least 1000 BC. The combination of the hilltop settlements into a single polity by the later 8th century BC was probably influenced by the trend for city-state formation emerging from ancient Greece.

Roman myth held that their city was founded by Romulus, son of the war god Mars and the Vestal virgin Rhea Silvia, fallen princess of Alba Longa and descendant of Aeneas of Troy. Exposed on the Tiber river, Romulus and his twin Remus were suckled by a she-wolf at the Lupercal before being raised by the shepherd Faustulus, taking revenge on their usurping great-uncle Amulius, and restoring Alba Longa to their grandfather Numitor. The brothers then decided to establish a new town but quarrelled over some details, ending with Remus's murder and the establishment of Rome on the Palatine Hill. The year of the supposed founding was variously computed by ancient historians, but the two dates seeming to be officially sanctioned were the Varronian chronology's 753 BC (used by Claudius's Secular Games and Hadrian's Romaea) and the adjacent year of 752 BC (used by the Fasti and the Secular Games of Antoninus Pius and Philip I). Despite known errors in Varro's calculations, it is the 753 BC date that continues to form the basis for most modern calculations of the AUC calendar era.

The Pleistocene (/ˈplaɪstəˌsiːn, -stoʊ-/ PLY-stə-seen, -⁠stoh-; referred to colloquially as the Ice Age) is the geological epoch that lasted from c. 2.58 million to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name comes from Ancient Greek πλεῖστος (pleîstos), meaning "most", and καινός (kainós), meaning "new, recent".

The aridification and cooling trends of the preceding Neogene were continued in the Pleistocene. The climate was strongly variable depending on the glacial cycle, oscillating between cold glacial periods and warmer interglacials, with the sea levels being up to 120 metres (390 ft) lower than present at peak glaciation, allowing the periodic connection of Asia and North America via the Beringia land bridge, and the covering of most of northern North America by the large Laurentide Ice Sheet.

The Paleolithic (/ˌpeɪlioʊˈlɪθɪk, ˌpæli-/ PAY-lee-oh-LITH-ik, PAL-ee-) or Old Stone Age is a period in human prehistory distinguished by the original development of stone tools. It represents almost the entire period of human prehistoric technology, extending from the earliest known use of stone tools by hominins, c. 3.3 million years ago, to the end of the Pleistocene, c. 11,650 cal BP.

The Paleolithic Age in Europe preceded the Mesolithic Age, although the date of the transition varies geographically by several thousand years. During the Paleolithic Age, hominins grouped together in small societies such as bands and subsisted by gathering plants, fishing, and hunting or scavenging wild animals. The Paleolithic Age is characterized by the use of knapped stone tools, although at the time humans also used wood and bone tools. Other organic commodities were adapted for use as tools, including leather and vegetable fibers; however, due to rapid decomposition, these have not survived to any great degree.

The Mesolithic (Greek: μέσος, mesos 'middle' + λίθος, lithos 'stone') or Middle Stone Age is the Old World archaeological period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic is often used synonymously, especially for outside northern Europe, and for the corresponding period in the Levant and Caucasus. The Mesolithic has different time spans in different parts of Eurasia. It refers to the final period of hunter-gatherer cultures in Europe and the Middle East, between the end of the Last Glacial Maximum and the Neolithic Revolution. In Europe it spans roughly 15,000 to 5,000 BP; in the Middle East (the Epipalaeolithic Near East) roughly 20,000 to 10,000 BP. The term is less used of areas farther east, and not at all of those beyond Eurasia and North Africa.

The type of culture associated with the Mesolithic varies between areas, but it is associated with a decline in the group hunting of large animals in favour of a broader hunter-gatherer way of life, and the development of more sophisticated and typically smaller lithic tools and weapons than the heavy-chipped equivalents typical of the Paleolithic. Depending on the region, some use of pottery and textiles may be found in sites allocated to the Mesolithic, but generally indications of agriculture are taken as marking transition into the Neolithic. The more permanent settlements tend to be close to the sea or inland waters offering a good supply of food. Mesolithic societies are not seen as very complex, and burials are fairly simple; in contrast, grandiose burial mounds are a mark of the Neolithic.

The 4.2-kiloyear event (also known as the 4.2 ka event) was an aridification event (long-term drought), 4,200 years ago (4,200 years BP). It was one of the most severe climatic events of the Holocene epoch. It defines the beginning of the current Meghalayan age in the Holocene epoch.

Starting around 2200 BC, it most likely lasted the entire 22nd century BC. It has been hypothesised to have caused the collapse of the Old Kingdom in Egypt, the Akkadian Empire in Mesopotamia, and the Liangzhu culture in the lower Yangtze River area. The drought may also have initiated the collapse of the Indus Valley Civilization, with some of its population moving southeast to follow the movement of their desired habitat, as well as the migration of Indo-European-speaking people into India. Some scientists disagree with that conclusion, citing evidence that the event was not a global drought and did not happen in a clear timeline.

Paleo-Indians (also spelled Paleoindians) were the first peoples who entered and subsequently inhabited the Americas towards the end of the Late Pleistocene period. The word comes from the prefix paleo-, taken from the Ancient Greek adjective: παλαιός, romanized: palaiós, lit. 'old; ancient', and "Indian", which has been historically used to refer to Indigenous peoples of the Americas. The term Paleo-Indian applies specifically to the lithic period in the Western Hemisphere and is distinct from the term Paleolithic.

Traditional theories suggest that big-animal hunters crossed the Bering Strait from North Asia into the Americas over a land bridge (Beringia). This bridge existed from 45,000 to 12,000 BCE (47,000–14,000 BP). Small isolated groups of hunter-gatherers migrated alongside herds of large herbivores far into Alaska. From c. 16,500 – c. 13,500 BCE (c. 18,500 – c. 15,500 BP), ice-free corridors developed along the Pacific coast and valleys of North America. This allowed land animals, followed by humans, to migrate south into the interior of the continent. The people went on foot or used boats along the coastline. The dates and routes of the peopling of the Americas remain subjects of ongoing debate. There were likely three waves of ancient settlers from the Bering Sea to the American continent.

This is a list of volcanoes that have had large explosive eruptions during the Holocene (since about 11,650 years Before Present), with a volcanic explosivity index (VEI) of 5 or higher, or a plume height of at least 30 km. To date, there have been no eruptions with a confirmed VEI of 8 in the Holocene; and only a few VEI-7 eruptions are thought to have occurred during this time: the most recent was the 1815 eruption of Mount Tambora.

The recent African origin of modern humans or the "Out of Africa" theory (OOA) holds that present-day humans outside Africa descend mainly from a single expansion of anatomically modern humans (Homo sapiens) from Africa about 70,000–50,000 years ago. It is the most widely accepted paleo-anthropological model of the geographic origin and early migration of the human species.

This expansion follows the early expansions of hominins out of Africa, accomplished by Homo erectus and then Homo neanderthalensis.

The Gravettian is an archaeological industry of the European Upper Paleolithic that succeeded the Aurignacian circa 33,000 years BP. It is archaeologically the last European culture many consider unified, and had mostly disappeared by c. 22,000 BP, close to the Last Glacial Maximum, although some elements lasted until c. 17,000 BP. In modern-day Portugal, Spain and France, it was succeeded by the Solutrean and by the Epigravettian in Italy, the Balkans, Ukraine and Russia.

The Gravettian culture is known for their artistic works including the famous Venus figurines, which were typically carved from either ivory or limestone. The culture was first identified at the site of La Gravette in the southwestern French department of Dordogne. While historically assumed to represent a genetically homogenous group, recent analysis of ancient DNA sequences suggests that the Gravettian was produced by multiple genetically divergent groups of hunter-gatherers. Eastern Gravettian-producing groups belong to the Věstonice cluster, while western Gravettian-producing groups belong to the Fournol cluster, both of which have genetic continuity from producers of the earlier Aurignacian. Fournol cluster-related groups are thought to be the ancestors of the producers of the following Solutrean and Magdalenian cultures present in Western Europe after the Last Glacial Maximum, while the producers of the Epigravettian are genetically distinct from Gravettian-producing groups.

Natural fibers or natural fibres (see spelling differences) are fibers that are produced by geological processes, or from the bodies of plants or animals. They can be used as a component of composite materials, where the orientation of fibers impacts the properties. Natural fibers can also be matted into sheets to make paper or felt.

The earliest evidence of humans using fibers is the discovery of wool and dyed flax fibers found in a prehistoric cave in the Republic of Georgia that date back to 36,000 BP. Natural fibers can be used for high-tech applications, such as composite parts for automobiles and medical supplies. Compared to composites reinforced with glass fibers, composites with natural fibers have advantages such as lower density, better thermal insulation, and reduced skin irritation. Further, unlike glass fibers, natural fibers can be broken down by bacteria once they are no longer used.

Khormusan industry was a Paleolithic archeological industry in Nubia dated at 42,000 to 18,000 BP.

The Khormusan industry in Nubia began between 42,000 and 32,000 BP. Khormusans developed tools not only from stone but also from animal bones and hematite. They also developed small arrow heads resembling those of Native Americans, but no bows have been found. The end of the Khormusan industry came around 18,000 BP, with the appearance of other cultures in the region, including the Gemaian.It was succeeded by the Halfan culture.

The Epipalaeolithic Near East designates the Epipalaeolithic ("Final Old Stone Age") in the prehistory of the Near East. It is the period after the Upper Palaeolithic and before the Neolithic, between approximately 25,000 and 11,500 years Before Present. The people of the Epipalaeolithic were nomadic hunter-gatherers who generally lived in small, seasonal camps rather than permanent villages. They made sophisticated stone tools using microliths—small, finely-produced blades that were hafted in wooden implements. These are the primary artifacts by which archaeologists recognise and classify Epipalaeolithic sites.

Although the appearance of microliths is an arbitrary boundary, the Epipalaeolithic does differ significantly from the preceding Upper Palaeolithic. Epipalaeolithic sites are more numerous, better preserved, and can be accurately radiocarbon dated. The period coincides with the gradual retreat of glacial climatic conditions between the Last Glacial Maximum and the start of the Holocene, and it is characterised by population growth and economic intensification. The Epipalaeolithic ended with the "Neolithic Revolution" and the onset of domestication, food production, and sedentism, although archaeologists now recognise that these trends began in the Epipalaeolithic.

Doggerland was a large area of land in Northern Europe, now submerged beneath the southern North Sea. This region was repeatedly exposed at various times during the Pleistocene epoch due to the lowering of sea levels during glacial periods. However, the term "Doggerland" is generally specifically used for this region during the Late Pleistocene and Early Holocene. During the early Holocene following the glacial retreat at the end of the Last Glacial Period, the exposed land area of Doggerland stretched across the region between what is now the east coast of Great Britain, northern France, Belgium, the Netherlands, north-western Germany, and the Danish peninsula of Jutland. Between 10,000 and 7,000 years ago, Doggerland was inundated by rising sea levels, disintegrating initially into a series of low-lying islands before submerging completely. The impact of the tsunami generated by the Storegga underwater landslide c. 8,200 years ago on Doggerland is controversial. The flooded land is known as the Dogger Littoral.

Doggerland was named after the present-time Dogger Bank (which in turn was named after 17th-century Dutch fishing boats called doggers), which is the remains of a highland region that became submerged later than the rest of Doggerland.

The Epigravettian (Greek: epi "above, on top of", and Gravettian) was one of the last archaeological industries and cultures of the European Upper Paleolithic. It emerged after the Last Glacial Maximum around ~21,000 cal. BP or 19,050 BC. It succeeds the Gravettian culture in Italy. Initially named Tardigravettian (Late Gravettian) in 1964 by Georges Laplace in reference to several lithic industries found in Italy, it was later renamed in order to better emphasize its independent character.

Three subphases, the Early Epigravettian (20,000 to 16,000 BP), the Evolved Epigravettian (16,000 to 14,000 BP) and the Final Epigravettian (14,000 to 8,000 BP), have been established, that were further subdivided and reclassified. In this sense, the Epigravettian is simply the Gravettian after ~21,000 BP, when the Solutrean had replaced the Gravettian in most of France and Spain.

The Solutrean /səˈljuːtriən/ industry is a relatively advanced flint tool-making style of the Upper Paleolithic of the Final Gravettian, from around 22,000 to 17,000 BP. Solutrean sites have been found in modern-day France, Spain and Portugal.

The broad spectrum revolution (BSR) hypothesis, proposed by Kent Flannery in a 1968 paper presented to a London University symposium, suggested that the emergence of the Neolithic in southwest Asia was prefaced by increases in dietary breadth among foraging societies. The broad spectrum revolution followed the most recent ice age around 15,000 BP in the Middle East and 12,000 BP in Europe. During this time, there was a transition from focusing on a few main food sources to gathering/hunting a "broad spectrum" of plants and animals.