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88-422: The line past Drøyliene was originally planned with several viaducts . During construction it was decided to instead build the line as a series of cuttings and six tunnels. Tamlaget Tunnel was the longest, at 204 meters (669 ft). This section opened on 16 January 1877. The original right-of-way through Drøyliene was plagued with rock slides and would fill with snow during winter. Proposals for replacing it with

176-475: A half millennia . It began with the incipient unification of Nile Valley polities around 3100 BC, traditionally under Menes . The civilisation of ancient Egypt was characterised primarily by intensive agricultural use of the fertile Nile Valley; the use of the Nile itself for transportation; the development of writing systems – first hieroglyphs and then later hieratic and other derived scripts – and literature ;

264-543: A landscape, usually by bridging a river valley or other eroded opening in an otherwise flat area. Often such valleys had roads descending either side (with a small bridge over the river, where necessary) that become inadequate for the traffic load, necessitating a viaduct for "through" traffic. Such bridges also lend themselves for use by rail traffic, which requires straighter and flatter routes. Some viaducts have more than one deck, such that one deck has vehicular traffic and another deck carries rail traffic. One example of this

352-493: A large kingdom at three different times in history. These are called the Old (20th to 18th centuries BC), Middle (14th to 11th centuries BC), and Neo-Assyrian (9th to 7th centuries BC) kingdoms, or periods. Mitanni was a Hurrian empire in northern Mesopotamia founded around 1500 BC. The Mitanians conquered and controlled Assyria until the 14th century BC while contending with Egypt for control of parts of modern Syria. Its capital

440-575: A later emperor, Darius the Great , expanded the empire to the Indus River , creating the largest empire in the world to that date. But Darius and his son Xerxes I failed to expand into Greece , with expeditions in 490 and 480 BC eventually failing. The Achaemenid dynasty and empire fell to Alexander the Great by 330 BC, and after Alexander's death, much of the area previously ruled by the Cyrus and his successors

528-447: A number of dynasties that peaked in power under the reign of Ashoka Maurya, one of India's most legendary and famous emperors. During the reign of Ashoka, the four dynasties of Chola , Chera , and Pandya were ruling in the South, while Devanampiya Tissa (250–210 BC) controlled Anuradhapura (now Sri Lanka ). These kingdoms, while not part of Ashoka's empire, were in friendly terms with

616-514: A period often known as the Vedic period . Between 1500 and 500 BC these peoples spread throughout most of India and had begun to found small cities. Vedic society was characterized by the varna system which divided society into four broad castes, which were later elaborated. By the end of the Vedic period, this way of organizing society had become central to Indian society. Religion in the late Vedic period

704-595: A repurposed rail viaduct provides a garden promenade on top and workspace for artisans below. The garden promenade is called the Coulée verte René-Dumont while the workspaces in the arches below are the Viaduc des Arts . The project was inaugurated in 1993. Manhattan's High Line , inaugurated in 2009, also uses an elevated train line as a linear urban park . In Indonesia viaducts are used for railways in Java and also for highways such as

792-456: A tradition of bronze production and the manufacture of evermore refined bronze and iron objects, such as plows, axes and sickles with shaft holes, socketed arrows and spearheads and small ornamented items. By about 500 BCE, large and delicately decorated bronze drums of remarkable quality, weighing more than 70 kg (150 lb), were produced in the laborious lost-wax casting process. This industry of highly sophisticated metal processing

880-523: A tunnel were first made in 1924, but work did not start until 1937, in conjunction with the gauge conversion of the railway. The break-through took place in 1943 and the tunnel opened on 7 July 1945. The Drøyli Tunnel has a length of 1,181 meters (3,875 ft) and carries a single track of non-electrified, standard gauge railway. Situated on the Røros Line, the southern end is situated 446.09 kilometers (277.19 mi) from Oslo Central Station . During

968-523: Is Harappan, after the first of its cities to be excavated, Harappa in the Pakistani province of Punjab . Harappan civilization grew out of the earlier agricultural communities as they evolved into cities. These communities created and traded jewelry, figurines, and seals that appear widely scattered throughout Mesopotamia, Afghanistan, and Iran. Chickens were domesticated in addition to the earlier crops and animals. They developed their own writing system,

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1056-617: Is a 19th-century derivation from an analogy with ancient Roman aqueducts . Like the Roman aqueducts , many early viaducts comprised a series of arches of roughly equal length. The longest viaduct in antiquity may have been the Pont Serme which crossed wide marshes in southern France. At its longest point, it measured 2,679 meters with a width of 22 meters. Viaducts are commonly used in many cities that are railroad hubs , such as Chicago, Birmingham, London and Manchester . These viaducts cross

1144-468: Is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide valley, road, river, or other low-lying terrain features and obstacles. The term viaduct is derived from the Latin via meaning "road", and ducere meaning "to lead". It

1232-500: Is built across land rather than water, the space below the arches may be used for businesses such as car parking, vehicle repairs, light industry, bars and nightclubs. In the United Kingdom, many railway lines in urban areas have been constructed on viaducts, and so the infrastructure owner Network Rail has an extensive property portfolio in arches under viaducts. In Berlin the space under the arches of elevated subway lines ( S-Bahn )

1320-883: Is the Prince Edward Viaduct in Toronto, Canada, that carries motor traffic on the top deck as Bloor Street , and metro as the Bloor-Danforth subway line on the lower deck, over the steep Don River valley . Others were built to span settled areas, crossing over roads beneath—the reason for many viaducts in London. Viaducts over water make use of islands or successive arches. They are often combined with other types of bridges or tunnels to cross navigable waters as viaduct sections, while less expensive to design and build than tunnels or bridges with larger spans, typically lack sufficient horizontal and vertical clearance for large ships. See

1408-407: Is used for several different purposes, including small eateries or bars. Elevated expressways were built in major cities such as Boston ( Central Artery ), Los Angeles, San Francisco, Seoul , Tokyo and Toronto ( Gardiner Expressway ). Some were demolished because they were unappealing and divided the city. In other cases, viaducts were demolished because they were structurally unsafe, such as

1496-514: Is yet to be confirmed with extensive survey work. With the help of archaeological excavations mainly by Susan and Roderick McIntosh , the site is known to have been occupied from 250 BC to AD 900. The city is believed to have been abandoned and moved where the current city is located due to the spread of Islam and the building of the Great Mosque of Djenné . Previously, it was assumed that advanced trade networks and complex societies did not exist in

1584-555: The Chaldeans in 614 BC. The Achaemenid Empire was founded by Cyrus the Great , who first became king of the Persians, then conquered the Medes, Lydia , and Babylon by 539 BC. The empire built on earlier Mesopotamian systems of government to govern their large empire. By building roads, they improved both the ability to send governmental instructions throughout their lands as well as improving

1672-526: The Chesapeake Bay Bridge-Tunnel . The Millau Viaduct is a cable-stayed road-bridge that spans the valley of the river Tarn near Millau in southern France. It opened in 2004 and is the tallest vehicular bridge in the world, with one pier's summit at 343 metres (1,125 ft). The viaduct Danyang–Kunshan Grand Bridge in China was the longest bridge in the world as of 2011 . Where a viaduct

1760-747: The Congo River and into the Great Lakes area. By AD 1000 these groups had spread throughout all of southern Africa south of the equator. Iron metallurgy and agriculture spread along with these peoples, with the cultivation of millet, oil palms, sorghum, and yams as well as the use of domesticated cattle, pigs, and sheep. These technologies helped increase population, and settled communities became common in sub-Saharan Africa except in deserts or heavy forests. Paleolithic tools have been discovered in India dating to 200,000 years ago, and Neolithic sites are known from near

1848-629: The Embarcadero Freeway in San Francisco, which was damaged by an earthquake in 1989. However, in developing nations such as Thailand ( Bang Na Expressway , the world's longest road bridge ), India ( Delhi-Gurgaon Expressway ), China, Bangladesh, Pakistan, and Nicaragua, elevated expressways have been built and more are under construction to improve traffic flow, particularly as a workaround of land shortage when built atop surface roads. Other uses have been found for some viaducts. In Paris, France,

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1936-658: The Indus Valley dating to around 8000 BC. Agriculture began in the Indus Valley around 7000 BC, and reached the Ganges Valley by 3000 BC. Barley , cotton , and wheat were grown and the population had domesticated cattle, goats, and sheep. The Indus Valley Civilisation developed around 3000 BC in the Indus and Ghaggar-Hakra river valleys of eastern Afghanistan , Pakistan, and western India. Another name for this civilisation

2024-490: The Indus Valley script , which is still mostly undeciphered. The exact structure of society and the way the cities were governed is not known. By about 1600 BC, the Indus Valley culture had abandoned many of their cities, including Mohenjo-Daro . The exact reason for this decline is not known. Indo-European speaking peoples began to spread into India about 1500 BC. The Rigveda , in Sanskrit , dates to this period and begins

2112-589: The Jakarta Inner Ring Road . In January 2019, the Alaskan Way Viaduct in Seattle was closed and replaced with a tunnel after several decades of use because it was seismically unsafe. Ancient history Ancient history is a time period from the beginning of writing and recorded human history through late antiquity . The span of recorded history is roughly 5,000 years, beginning with

2200-575: The Maccabean revolt led to independence during Hellenistic period until Roman conquest . Phoenicia was an ancient civilisation centered in the north of ancient Canaan , with its heartland along the coastal regions of modern-day Lebanon , Syria and Israel. Phoenician civilisation was an enterprising maritime trading culture that spread across the Mediterranean between the period of 1550 to 300 BC. One Phoenician colony, Carthage , ruled an empire in

2288-766: The Maritime Jade Road , a jade trade network, in Southeast Asia which existed in Taiwan and the Philippines for 3,000 years from 2000 BCE to 1000 CE. The trade was established by links between the indigenous peoples of Taiwan and the Philippines, and later included parts of Vietnam, Malaysia, Indonesia, Thailand, and other areas in Southeast Asia (known as the Sa Huynh - Kalanay Interaction Sphere). Lingling-o artifacts are one of

2376-583: The Maurya Empire . An alliance existed between Devanampiya Tissa and Ashoka of India, who sent Buddhist missionaries to Sri Lanka. Most of North India was reunited under the Gupta Empire beginning under Chandragupta I around AD 320. Under his successors the empire spread to include much of India except for the Deccan Plateau and the very south of the peninsula. This was a period of relative peace, and

2464-739: The Nile Delta in the north, as far south as Jebel Barkal at the Fourth Cataract of the Nile. Extensions to the geographical range of ancient Egyptian civilisation included, at different times, areas of the southern Levant , the Eastern Desert and the Red Sea coastline, the Sinai Peninsula , and the Western Desert (focused on the several oases ). Ancient Egypt developed over at least three and

2552-661: The Old Kingdom , which saw pyramid building on a large scale. After 2100 BC, the Old Kingdom dissolved into smaller states during the First Intermediate Period , which lasted about 100 years. The Middle Kingdom began around 2000 BC with the reunification of Egypt under pharoes ruling from Thebes . The Middle Kingdom ended with the conquest of northern Egypt by the Hyksos around 1650 BC. The Hyksos were expelled from Egypt and

2640-787: The Pitcairns , the Kermadec Islands , and the Norfolk Islands were also formerly settled by Austronesians but later abandoned. There is also putative evidence, based in the spread of the sweet potato , that Austronesians may have reached South America from Polynesia, where they might have traded with the Indigenous peoples of the Americas . Austronesians established prehistoric maritime trade networks in Island Southeast Asia, including

2728-812: The Seleucid Empire . Parthia had many wars with the Romans, but it was rebellions within the empire that ended it in the 3rd century AD. The Sasanian Empire began when the Parthian Empire ended in AD 224. Their rulers claimed the Achaemenids as ancestors and set up their capital at Ctesiphon in Mesopotamia. Their period of greatest military expansion occurred under Shapur I , who by the time of his death in AD 272 had defeated Roman imperial armies and set up buffer states between

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2816-491: The Zapotec civilization . The ancient Near East is considered the cradle of civilization . It was the first to practice intensive year-round agriculture; created one of the first coherent writing systems , invented the potter's wheel and then the vehicular wheel , created the first centralized governments , law codes and empires, as well as displaying social stratification , slavery, and organized warfare. It began

2904-563: The Assyrians, who conquered Israel in 722 BC. The Neo-Babylonian Empire did the same to Judah in 586. After both conquests, the conquering forces deported many of the inhabitants to other regions of their respective empires. Following the fall of Babylon to the Persian Empire, Cyrus the Great allowed the rebuilding of the temple at Jerusalem , and some of the exiles from Judah returned to Judea , where they remained under Persian rule until

2992-628: The Egyptians as a possible challenge to their hegemony , but an ethnic group rather than an organised state. Israel had emerged by the middle of the 9th century BC, when the Assyrian King Shalmaneser III named " Ahab the Israelite" among his enemies at the battle of Qarqar (853). Judah emerged somewhat later than Israel, probably during the 9th century BC, but the subject is one of considerable controversy. Israel came into conflict with

3080-510: The Fertile Crescent, alongside the first evidence for agriculture. Other animals, such as pigs and poultry , were later domesticated and used as food sources. Cattle and water buffalo were domesticated around 7000 BC and horses , donkeys , and camels were domesticated by about 4000 BC. All of these animals were used not only for food, but to carry and pull people and loads, greatly increasing human ability to do work. The invention of

3168-596: The Gupta rulers generally left administration in local rulers. The Gupta Empire was weakened and ultimately ruined by the raids of Hunas (a branch of the Hephthalites emanating from Central Asia), and the empire broke up into smaller regional kingdoms by the end of the fifth century AD. India would remain fragmented into smaller states until the rise of the Mughal Empire in the 1500s. The Neolithic period of Southeast Asia

3256-864: The Malayan-Indonesian " thalassian " zone shared these characteristics with Indochinese polities like the Pyu city-states in the Irrawaddy River valley, the Văn Lang kingdom in the Red River Delta and Funan around the lower Mekong . Văn Lang, founded in the 7th century BCE, endured until 258 BCE under the Hồng Bàng dynasty , as part of the Đông Sơn culture that sustained a dense and organised population that produced an elaborate Bronze Age industry. Intensive wet-rice cultivation in an ideal climate enabled

3344-681: The Middle East. Egypt developed its own system of hieroglyphs by about 3200 BC. By 2800 BC the Indus Valley Civilization had developed its Indus script , which remains undeciphered. Chinese Characters were independently developed in China during the Shang dynasty in the form of the Oracle Bone Script dating to the period 1600 to 1100 BC. Writing in Mesoamerica dates to 600 BC with

3432-569: The Nubians had created a new kingdom further south, known as the Kingdom of Kush , centred on the upper Nile with a capital at Kerma . In the Egyptian New Kingdom period, Kush once more was conquered by Egypt. However, by 1100 BC a new kingdom of Kush had formed, with a capital at Napata . Nubian rulers conquered Egypt around 760 BC and retained control for about a century. The Kingdom of Aksum

3520-635: The Pacific Islands to successfully retain rice cultivation. Palau and Yap were settled by separate voyages by 1000 BCE. Another important migration branch was by the Lapita culture , which rapidly spread into the islands off the coast of northern New Guinea and into the Solomon Islands and other parts of coastal New Guinea and Island Melanesia by 1200 BCE. They reached the islands of Fiji , Samoa , and Tonga by around 900 to 800 BCE. This remained

3608-465: The Røros Line 276 meters (906 ft). The tracks along Drøyliene were removed, but the telecommunication line was kept. The right-of-way and telecommunication lines have been listed as cultural heritage as remnants of the original narrow-gauge route of the Rørøs Line. The listing involves that the route is kept free of vegetation, loose rock is removed from the mountainside and the telephone cables and masts are retained. Viaducts A viaduct

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3696-401: The Sasanians and Roman Empires. After Shapur, the Sasanians were under more pressure from the Kushans to their east as well as the Roman then Byzantine Empire to its west. However, the Sasanians rebuilt and founded numerous cities and their merchants traveled widely and introduced crops such as sugar, rice, and cotton into the Iranian plateau. But in AD 651, the last Sassanid emperor was killed by

3784-411: The Western Mediterranean until being defeated by Rome in the Punic Wars . The Phoenicians invented the Phoenician alphabet , the forerunner of the modern alphabet still in use today. The history of Pre-Islamic Arabia before the rise of Islam in the AD 630s is not known in great detail. Archaeological exploration in the Arabian Peninsula has been sparse; indigenous written sources are limited to

3872-492: The ability of their military forces to be deployed rapidly. Increased trade and upgraded farming techniques increased wealth, but also exacerbated inequalities between social classes. The empire's location at the centre of trading networks spread its intellectual and philosophical ideas throughout a wide area, and its religion, while not itself spreading far, had an impact on later religions such as Christianity , Islam , and Judaism . Cyrus' son Cambyses II conquered Egypt, while

3960-433: The archipelago of the Philippines , intermingling with the earlier Australo-Melanesian population who had inhabited the islands since about 23,000 years earlier. Over the next thousand years, Austronesian peoples migrated southeast to the rest of the Philippines, and into the islands of the Celebes Sea and Borneo. From southwestern Borneo, Austronesians spread further west in a single migration event to both Sumatra and

4048-406: The capital of the Akkadian Empire. Despite an extensive search, the precise site has never been found. Akkad reached the height of its power between about 2330 and 2150 BC, following the conquests of King Sargon of Akkad . Through the spread of Sargon's empire, the language of Akkad, known as Akkadian from the city, spread and replaced the Sumerian language in Mesopotamia and eventually by 1450 BC

4136-407: The casting of iron with molds and then hammering it which enabled weapons and tools to be made stronger and also cheaper. Although chariots had been used previously, the use of spoked wheels allowed the chariots to be much lighter and more maneuverable. In 1274 BC the Hittites clashed with the Egyptians at the Battle of Kadesh , where both sides claimed victory. In 1207 the Hittite capital of Hattusa

4224-423: The coastal regions of southern Vietnam, becoming the ancestors of the speakers of the Malayic and Chamic branches of the Austronesian language family. Soon after reaching the Philippines, Austronesians colonized the Northern Mariana Islands by 1500 BCE or even earlier, becoming the first humans to reach Remote Oceania . The Chamorro migration was also unique in that it was the only Austronesian migration to

4312-519: The construction of the Røros Line between 1872 and 1877, the section past Drøyliene proved to be one of the most challenging to build. The originally surveyed route consisting of a series of viaducts had to be abandoned in favor of blasting the route out of bedrock. This was done through a mix of cuttings and tunnels. Construction was made more difficult after it was discovered that the quarry near by which did not meet standards, and that stone and gravel had to be transported up to 50 kilometers (31 mi) to

4400-437: The controlled use of fire dating to 780,000 years ago. Actual use of hearths first appears 400,000 years ago. Dates for the emergence of Homo sapiens (modern humans) range from 250,000 to 160,000 years ago, with the varying dates being based on DNA studies and fossils respectively. Some 50,000 years ago, Homo sapiens migrated out of Africa . They reached Australia about 45,000 years ago, southwestern Europe about

4488-417: The development of Sumerian cuneiform script. Ancient history covers all continents inhabited by humans in the period 3000 BC – AD 500, ending with the expansion of Islam in late antiquity. The three-age system periodizes ancient history into the Stone Age , the Bronze Age , and the Iron Age , with recorded history generally considered to begin with the Bronze Age. The start and end of

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4576-484: The empire was Aksum , now in northern Ethiopia. The Nok culture appeared in Nigeria around 1000 BC and mysteriously vanished around AD 200. The civilisation's social system is thought to have been highly advanced. The Nok civilisation was considered to be the earliest sub-Saharan producer of life-sized Terracotta which have been discovered by archaeologists. The Nok also used iron smelting that may have been independently developed. The civilisation of Djenné-Djenno

4664-438: The entire territory. Among large, thin-walled terracotta jars, ornamented and colorized cooking pots, glass items, jade earrings and metal objects were deposited near the rivers and along the coast. Around 3000 to 1500 BCE, a large-scale migration of Austronesians , known as the Austronesian expansion began from Taiwan . Population growth primarily fueled this migration. These first settlers settled in northern Luzon , in

4752-486: The expanding Islamic Arabs. The Hittites first came to Anatolia about 1900 BC and during the period 1600-1500 they expanded into Mesopotamia where they adopted the cuneiform script to their Indo-European language. By 1200 their empire stretched to Phoenicia and eastern Anatolia . They improved two earlier technologies from Mesopotamia and spread these new techniques widely – improved iron working and light chariots with spoked wheels in warfare. The Hittites introduced

4840-461: The farming communities to produce a regular crop surplus that was used by the ruling elite to raise, command and pay work forces for public construction and maintenance projects such as canals and fortifications. The earliest known evidence of copper and bronze production in Southeast Asia was found at Ban Chiang in north-east Thailand and among the Phùng Nguyên culture of northern Vietnam around 2000 BCE. The Đông Sơn culture established

4928-512: The furthest extent of the Austronesian expansion into Polynesia until around 700 CE, when there was another surge of island colonization. It reached the Cook Islands , Tahiti , and the Marquesas by 700 CE; Hawaii by 900 CE; Rapa Nui by 1000 CE; and New Zealand by 1200 CE. For a few centuries, the Polynesian islands were connected by bidirectional long-distance sailing, with the exception of Rapa Nui, which had limited further contact due to its isolated geographical location. Island groups like

5016-445: The land was reunited in the New Kingdom around 1550 BC. This period lasted until about 1000 BC, and saw Egypt expand its borders into Palestine and Syria. The Third Intermediate Period was marked by the rule of priests as well as the conquest of Egypt by Nubian kings and then later Assyria, Persia, and Macedonians. The Ta-Seti kingdom in Nubia to the south of Egypt was conquered by Egyptian rulers around 3100 BC, but by 2500 BC

5104-498: The large railroad yards that are needed for freight trains there, and also cross the multi-track railroad lines that are needed for heavy rail traffic. These viaducts provide grade separation and keep highway and city street traffic from having to be continually interrupted by the train traffic. Likewise, some viaducts carry railroads over large valleys, or they carry railroads over cities with many cross-streets and avenues. Many viaducts over land connect points of similar height in

5192-414: The many inscriptions and coins from southern Arabia. Existing material consists primarily of written sources from other traditions (such as Egyptians, Greeks, Persians, Romans, etc.) and oral traditions later recorded by Islamic scholars. A number of small kingdoms existed in Arabia from around AD 100 to perhaps about AD 400. Carthage was founded around 814 BC by Phoenician settlers. Ancient Carthage

5280-442: The organisation of collective projects such as the pyramids ; trade with surrounding regions; and a polytheistic religious tradition that included elaborate funeral customs including mummification . Overseeing these activities were a socio-political and economic elite under the figure of a (semi)-divine ruler from a succession of ruling dynasties . Ancient Egyptian history is divided across various periods, beginning with

5368-472: The population to settle in one place instead of migrating after crops and herds. It also allowed for a much greater population density, and in turn required an extensive labour force and division of labour. This organization led to the necessity of record keeping and the development of writing. Babylonia was an Amorite state in lower Mesopotamia (modern southern Iraq ), with Babylon as its capital. Babylonia emerged when Hammurabi created an empire out of

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5456-408: The region in the former savannah of the Sahara. Its inhabitants fished and grew millet. It has been found that the Soninke of the Mandé peoples were responsible for constructing such settlements. Around 300 BC, the region became more desiccated and the settlements began to decline, most likely relocating to Koumbi Saleh. From the type of architecture and pottery, it is believed that Tichit was related to

5544-465: The region until the arrival of traders from Southwest Asia . However, sites such as Djenné-Djenno disprove this, as these traditions in West Africa flourished long before. Towns similar to that at Djenne-Jeno also developed at the site of Dia, also in Mali along the Niger River , from around 900 BC. Dhar Tichitt and Oualata were prominent among the early urban centres, dated to 2000 BC, in present-day Mauritania. About 500 stone settlements littered

5632-420: The same time period. Cultivation of millet, rice , and legumes began around 7000 BC in China . Taro cultivation in New Guinea dates to about 7000 BC also with squash cultivation in Mesoamerica perhaps sharing that date. Animal domestication began with the domestication of dogs , which dates to at least 15,000 years ago, and perhaps even earlier. Sheep and goats were domesticated around 9000 BC in

5720-554: The same time, southeastern Europe and Siberia around 40,000 years ago, and Japan about 30,000 years ago. Humans migrated to the Americas about 15,000 years ago. Evidence for agriculture emerges in about 9000 BC in what is now eastern Turkey and spread through the Fertile Crescent . Settlement at Göbekli Tepe began around 9500 BC and may have the world's oldest temple. The Nile River Valley has evidence of sorghum and millet cultivation starting around 8000 BC and agricultural use of yams in Western Africa perhaps dates to

5808-408: The section was made as early as 1924. The proposal called for a 526-meter (1,726 ft) tunnel. No funding was granted, and the plans were shelved until the decision for the Røros Line to receive gauge conversion to standard gauge. The 1935 decision called for a longer tunnel, which would be built as a branch of the existing Tamlaget Tunnel. The new tunnel became 1,181 meters (3,875 ft) long, with

5896-446: The shorter tunnels received names. The section was prone to landslides during the summer and heavy snowfall during the winter, making it an operational headache for the Norwegian State Railways . The particularities of Drøyliene meant that as little snowfall as 5 to 10 centimeters (2 to 4 in) could be caught by the wind and blown into and filling the cutting , hindering traffic or causing trains to get stuck. Proposals for replacing

5984-412: The simple plough by 6000 BC further increased agricultural efficiency. Metal use in the form of hammered copper items predates the discovery of smelting of copper ores , which happened around 6000 BC in western Asia and independently in eastern Asia before 2000 BC. Gold and silver use dates to between 6000 and 5000 BC. Alloy metallurgy began with bronze in about 3500 BC in Mesopotamia and

6072-425: The site. By June 1975 the line was completed to Drøya Bridge, allowing the stones and gravel to be transported by train. The work resulted in six short tunnels, measuring from 18 to 204 meters (59 to 669 ft) in length. There was also a narrow curve with a radius of 205 meters (673 ft). The longest, Tamlaget Tunnel, was on the line's opening on 16 January 1877 the second-longest railway tunnel in Norway. None of

6160-512: The southernmost 146 meters (479 ft) being common with the old tunnel. Construction commenced in the fall of 1937, with the tunnel hand drilled from both ends. Machine drilling was taken into use on the northern end on the northern side from the summer of 1938. The work on the Drøyli Tunnel was not finished in time for the gauge conversion in 1941, causing the cutting to have to be expanded. The tunnel's breakthrough occurred in 1943 and it could be taken into use on 7 July 1945. The tunnel shortened

6248-525: The study of the stars and the sciences of astronomy and mathematics. Mesopotamia is the site of some of the earliest known civilisations in the world. Agricultural communities emerged in the area with the Halaf culture around 8000 BC and continued to expand through the Ubaid period around 6000 BC. Cities began in the Uruk period (4000–3100 BC) and expanded during the Jemdet Nasr (3100–2900 BC) and Early Dynastic (2900–2350 BC) periods. The surplus of storable foodstuffs created by this economy allowed

6336-489: The subsequent Ghana Empire. Old Jenne (Djenne) began to be settled around 300 BC, producing iron and with sizeable population, evidenced in crowded cemeteries. The inhabitants and creators of these settlements during these periods are thought to have been ancestors of the Soninke people. Peoples speaking precursors to the modern-day Bantu languages began to spread throughout southern Africa, and by 2000 BC they were expanding past

6424-517: The territories of the former kingdoms of Sumer and Akkad . The Neo-Babylonian Empire , or Chaldea , was Babylonia from the 7th and 6th centuries BC. Under the reign of Nebuchadnezzar II , it conquered Jerusalem . This empire also created the Hanging Gardens of Babylon and the still-surviving Ishtar Gate as architectural embellishments of its capital at Babylon. Akkad was a city and its surrounding region near Babylon. Akkad also became

6512-585: The three ages vary between world regions. In many regions the Bronze Age is generally considered to begin a few centuries prior to 3000 BC, while the end of the Iron Age varies from the early first millennium BC in some regions to the late first millennium AD in others. During the time period of ancient history, the world population was already exponentially increasing due to the Neolithic Revolution , which

6600-590: The work of archaeologists. Prehistory is often known as the Stone Age , and is divided into the Paleolithic (earliest), Mesolithic , and Neolithic . The early human migrations in the Lower Paleolithic saw Homo erectus spread across Eurasia 1.8 million years ago. Evidence for the use of fire has been dated as early as 1.8 million years ago, a date which is contested, with generally accepted evidence for

6688-526: Was Washukanni , whose precise location has not been determined by archaeologists. The Medes and Persians were peoples who had appeared in the Iranian plateau around 1500 BC. Both peoples spoke Indo-European languages and were mostly pastoralists with a tradition of horse archery. The Medes established their own Median Empire by the 6th century BC, having defeated the Neo-Assyrian Empire with

6776-522: Was a city-state that ruled an empire through alliances and trade influence that stretched throughout North Africa and modern Spain . At the height of the city's influence, its empire included most of the western Mediterranean. The empire was in a constant state of struggle with the Roman Republic , which led to a series of conflicts known as the Punic Wars . After the third and final Punic War , Carthage

6864-487: Was an important trading nation in northeastern Africa centered in present-day Eritrea and northern Ethiopia , it existed from approximately AD 100 to 940, growing from the Iron Age proto-Aksumite period around the 4th century BC to achieve prominence by the 1st century AD. The Kingdom of Aksum at its height by the early 6th-century AD extended through much of modern Ethiopia and across the Red Sea to Arabia. The capital city of

6952-445: Was characterized by several migrations into Mainland and Island Southeast Asia from southern China by Austronesian , Austroasiatic , Kra-Dai and Hmong-Mien -speakers. Territorial principalities in both Insular and Mainland Southeast Asia, characterized as "agrarian kingdoms", developed an economy by around 500 BCE based on surplus crop cultivation and moderate coastal trade of domestic natural products. Several states of

7040-529: Was destroyed and then occupied by Roman forces. Nearly all of the territory held by Carthage fell into Roman hands. Ancient Egypt was a long-lived civilisation geographically located in north-eastern Africa. It was concentrated along the middle to lower reaches of the Nile River, reaching its greatest extent during the 2nd millennium BC, which is referred to as the New Kingdom period. It reached broadly from

7128-455: Was developed independent of Chinese or Indian influence. Historians relate these achievements to the presence of organized, centralized and hierarchical communities and a large population. Between 1000 BCE and 100 CE, the Sa Huỳnh culture flourished along the south-central coast of Vietnam . Ceramic jar burial sites that included grave goods have been discovered at various sites along

7216-710: Was developed independently in China by 2000 BC. Pottery developed independently throughout the world, with fired pots appearing first among the Jomon of Japan and in West Africa at Mali . Sometime between 5000 and 4000 BC the potter's wheel was invented. By 3000 BC, the pottery wheel was adapted into wheeled vehicles which could be used to carry loads further and easier than with human or animal power alone. Writing developed separately in five different locations in human history: Mesopotamia, Egypt, India, China, and Mesoamerica. By 3400 BC, "proto-literate" cuneiform spread in

7304-421: Was evolving into Hinduism , which spread throughout Southeast Asia. Siddhartha Gautama , born around 560 BC in northern India, went on to found a new religion based on his ascetic life – Buddhism . This faith also spread throughout Eastern and Southeastern Asia after his death. This period also saw the composition of the epics Ramayana and Mahabharata . The kingdom of Magadha rose to prominence under

7392-454: Was in full progress. While in 10,000 BC, the world population stood at 2 million, it rose to 45 million by 3000 BC. By the Iron Age in 1000 BC, the population had risen to 72 million. By the end of the ancient period in AD 500, the world population is thought to have stood at 209 million. In 10,500 years, the world population increased by 100 times. Prehistory is the period before written history. Most of our knowledge of that period comes from

7480-516: Was located in the Niger River Valley in the country of Mali and is considered to be among the oldest urbanized centers and the best-known archaeology site in sub-Saharan Africa . This archaeological site is located about 3 kilometers (1.9 miles) away from the modern town and is believed to have been involved in long-distance trade and possibly the domestication of African rice. The site is believed to exceed 33 hectares (82 acres); however, this

7568-502: Was ruled by the Seleucid dynasty . Parthia was an Iranian civilisation situated in the northeastern part of modern Iran. Their power was based on a combination of military power based on heavy cavalry with a decentralised governing structure based on a federated system . The Parthian Empire was led by the Arsacid dynasty , which by around 155 BC under Mithradates I had mostly conquered

7656-658: Was sacked, ending the Hittite Empire . Israel and Judah were related Iron Age kingdoms of the ancient Levant and had existed during the Iron Ages and the Neo-Babylonian, Persian and Hellenistic periods. The name Israel first appears in the stele of the Egyptian pharaoh Merneptah around 1209 BC. This "Israel" was a cultural and probably political entity of the central highlands, well enough established to be perceived by

7744-623: Was the main language of diplomacy in the Near East. Assyria was originally a region on the Upper Tigris , where a small state was created in the 19th century BC. The capital was at Assur , which gave the state its name. Later, as a nation and empire that came to control all of the Fertile Crescent, Egypt and much of Anatolia , the term "Assyria proper" referred to roughly the northern half of Mesopotamia (the southern half being Babylonia), with Nineveh as its capital. The Assyrian kings controlled

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