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31st Century BC
The 31st century BC was a century that lasted from the year 3100 BC to 3001 BC. Events *c. 3100 BC: Polo () was first played in Manipur state. *c. 3100 BC?: The Anu Ziggurat and White Temple are built in Uruk. *c. 3100 BC?: Predynastic period (Neolithic) ends in Ancient Egypt. *c. 3100 BC?: Early Dynastic (Archaic) period starts in Ancient Egypt. *c. 3100 BC?: The first temple of Tarxien is in use by the Neolithic inhabitants of Malta. *c. 3100 BC?: First stage in the construction of Stonehenge. *c. 3100 BC: Oldest adobe building in the Americas was built in Peru. *c. 3100 BC – 2600 BC: Skara Brae, Orkney Islands, Scotland is inhabited. *c. 3090 BC: Narmer (Menes) unifies Upper and Lower Egypt into one country; he rules this new country from Memphis. *c. 3051 BC: The oldest currently living organism, a Great Basin bristlecone pine, undergoes germination in the White Mountains of California. Inventions, discoveries, introductions * Drainage and sewage system in the Indu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Century
A century is a period of 100 years or 10 decades. Centuries are numbered ordinally in English and many other languages. The word ''century'' comes from the Latin ''centum'', meaning ''one hundred''. ''Century'' is sometimes abbreviated as c. A centennial or centenary is a hundredth anniversary, or a celebration of this, typically the remembrance of an event which took place a hundred years earlier. Start and end of centuries Although a century can mean any arbitrary period of 100 years, there are two viewpoints on the nature of standard centuries. One is based on strict construction, while the other is based on popular perception. According to the strict construction, the 1st century AD, which began with AD 1, ended with AD 100, and the 2nd century with AD 200; in this model, the ''n''-th century starts with a year that follows a year with a multiple of 100 (except the first century as it began after the year 1 BC) and ends with the next coming year with a multiple o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skara Brae
Skara Brae is a stone-built Neolithic settlement, located on the Bay of Skaill in the parish of Sandwick, Orkney, Sandwick, on the west coast of Mainland, Orkney, Mainland, the largest island in the Orkney archipelago of Scotland. It consisted of ten clustered houses, made of flagstones, in earthen dams that provided support for the walls; the houses included stone hearths, beds, and cupboards. A primitive sewer system, with "toilets" and drains in each house, included water used to flush waste into a drain and out to the ocean. The site was occupied from roughly 3180 BC to around 2500 BC and is Europe's most complete Neolithic village. Skara Brae gained UNESCO World Heritage Site status as one of four sites making up "The Heart of Neolithic Orkney". Older than Stonehenge and the Great Pyramids of Giza, it has been called the "Scottish Pompeii" because of its excellent preservation. Care of the site is the responsibility of Historic Environment Scotland which works with par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canal
Canals or artificial waterways are waterways or engineered channels built for drainage management (e.g. flood control and irrigation) or for conveyancing water transport vehicles (e.g. water taxi). They carry free, calm surface flow under atmospheric pressure, and can be thought of as artificial rivers. In most cases, a canal has a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as ''slack water levels'', often just called ''levels''. A canal can be called a navigation canal when it parallels a natural river and shares part of the latter's discharges and drainage basin, and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its valley. A canal can cut across a drainage divide atop a ridge, generally requiring an external water source above the highest elevation. The best-known example of such a canal is the Panama Can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indus Valley Civilization
The Indus Valley Civilisation (IVC), also known as the Indus Civilisation, was a Bronze Age civilisation in the northwestern regions of South Asia, lasting from 3300 BCE to 1300 BCE, and in its mature form from 2600 BCE to 1900 BCE. Together with ancient Egypt and Mesopotamia, it was one of three early civilisations of the Near East and South Asia, and of the three, the most widespread, its sites spanning an area including much of Pakistan, northwestern India and northeast Afghanistan. The civilisation flourished both in the alluvial plain of the Indus River, which flows through the length of Pakistan, and along a system of perennial monsoon-fed rivers that once coursed in the vicinity of the Ghaggar-Hakra, a seasonal river in northwest India and eastern Pakistan. The term ''Harappan'' is sometimes applied to the Indus Civilisation after its type site Harappa, the first to be excavated early in the 20th century in what was then the Punjab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sewage
Sewage (or domestic sewage, domestic wastewater, municipal wastewater) is a type of wastewater that is produced by a community of people. It is typically transported through a sewerage, sewer system. Sewage consists of wastewater discharged from residences and from commercial, institutional and public facilities that exist in the locality. Text was copied from this source, which is available under a creativecommons:by/4.0/, Creative Commons Attribution 4.0 International License Sub-types of sewage are greywater (from sinks, bathtubs, showers, dishwashers, and clothes washers) and blackwater (waste), blackwater (the water used to flush toilets, combined with the human waste that it flushes away). Sewage also contains soaps and detergents. Food waste may be present from dishwashing, and food quantities may be increased where garbage disposal units are used. In regions where toilet paper is used rather than bidets, that paper is also added to the sewage. Sewage contains macro-pollu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drainage
Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess water. The internal drainage of most agricultural soils can prevent severe waterlogging (anaerobic conditions that harm root growth), but many soils need artificial drainage to improve production or to manage water supplies. History Early history The Indus Valley Civilization had sewerage and drainage systems. All houses in the major cities of Harappa and Mohenjo-daro had access to water and drainage facilities. Waste water was directed to covered gravity sewers, which lined the major streets. 18th and 19th century The invention of hollow-pipe drainage is credited to Sir Hugh Dalrymple, who died in 1753. Current practices Simple infrastructure such as open drains, pipes, and berms are still common. In modern times, more complex structures involving substantial earthworks and new technologies have been common as well. Geotextiles New storm water drainag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Mountains (California)
The White Mountains of California and Nevada are a triangular fault-block mountain, fault-block mountain range facing the Sierra Nevada (U.S.), Sierra Nevada across the upper Owens Valley. They extend for approximately as a greatly elevated plateau about wide on the south, narrowing to a point at the north, with elevations generally increasing south to north. The range's broad southern end is near the community of Big Pine, California, Big Pine, where Westgard Pass and Deep Springs Valley separate it from the Inyo Mountains. The narrow northern end is at Montgomery Pass, Nevada, Montgomery Pass, where U.S. Route 6 crosses. The Fish Lake Valley lies east of the range; the southeast part of the mountains are separated from the Silver Peak Range by block faulting across the Furnace Creek Fault Zone, forming a feeder valley to Fish Lake Valley. The range lies within the eastern section of the Inyo National Forest. Ecology Ecologically, the White Mountains are like the other ranges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinus Longaeva
''Pinus longaeva'' (commonly referred to as the Great Basin bristlecone pine, intermountain bristlecone pine, or western bristlecone pine) is a long-living species of bristlecone pine tree found in the higher mountains of California, Nevada, and Utah. In 1987, the bristlecone pine was designated one of Nevada's List of U.S. state trees, state trees. Methuselah (pine tree), Methuselah is a Great Basin bristlecone pine that is years old and has been credited as the oldest known living non-Vegetative reproduction, clonal organism on Earth. Description It is a medium-size tree, reaching tall and with a trunk diameter of up to . The bark is bright orange-yellow, thin and scaly at the base of the trunk. The Pine#Foliage, needles are in fascicles of five, stout, long, deep green to blue-green on the outer face, with stomata confined to a bright white band on the inner surfaces. The leaves show the longest persistence of any plant, with some remaining green for 45 years (Ewers & Schm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Oldest Trees
This is a list of the oldest-known trees, as reported in reliable sources. Definitions of what constitutes an individual tree vary. In addition, tree ages are derived from a variety of sources, including documented "tree-ring" ( dendrochronological) count core samples, and from estimates. For these reasons, this article presents three lists of "oldest trees," each using varying criteria. There are three tables of trees, which are listed by age and species. The first table includes trees for which a minimum age has been directly determined, either through counting or cross-referencing tree rings or through radiocarbon dating. Many of these trees may be even older than their listed ages, but the oldest wood in the tree has rotted away. For some old trees, so much of the center is missing that their age cannot be directly determined. Instead, estimates are made based on the tree's size and presumed growth rate. The second table includes trees with these estimated ages. The last table ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Memphis, Egypt
Memphis (, ; Bohairic ; ), or Men-nefer, was the ancient capital of Inebu-hedj, the first Nome (Egypt), nome of Lower Egypt that was known as ''mḥw'' ("North"). Its ruins are located in the vicinity of the present-day village of Mit Rahina (), in markaz (county) Badrashin, Giza, Egypt. Along with the Memphite Necropolis, pyramid fields that stretch on a desert plateau for more than on its west, including the famous Giza pyramid complex, Pyramids of Giza, Memphis and its necropolis have been listed as a World Heritage Site. The site is open to the public as an open-air museum. According to legends related in the early third century BC by Manetho, a priest and historian who lived in the Ptolemaic Kingdom during the Hellenistic period of ancient Egypt, the city was founded by Pharaoh, King Menes. It was the List of Egyptian capitals, capital of ancient Egypt (''Kemet'' or ''Kumat'') during both the Early Dynastic Period of Egypt, Early Dynastic Period and Old Kingdom and remain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Egypt
Lower Egypt ( ') is the northernmost region of Egypt, which consists of the fertile Nile Delta between Upper Egypt and the Mediterranean Sea, from El Aiyat, south of modern-day Cairo, and Dahshur. Historically, the Nile River split into seven branches of the delta in Lower Egypt. Lower Egypt was divided into nomes and began to advance as a civilization after 3600 BC. Today, it contains two major channels that flow through the delta of the Nile River – Mahmoudiyah Canal (ancient Agathos Daimon) and Muways Canal (, "waterway of Moses"). Name In Ancient Egyptian, Lower Egypt was known as ''mḥw'' which means "north". Later on, during Antiquity and the Middle Ages, Greeks and Romans called it ''Κάτω Αἴγυπτος'' or ''Aegyptus Inferior'' both meaning "Lower Egypt", but Copts carried on using the old name related to the north – ''Tsakhet'' () or ''Psanemhit'' () meaning the "Northern part". It was further divided into a number of regions or nomes () – '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Egypt
Upper Egypt ( ', shortened to , , locally: ) is the southern portion of Egypt and is composed of the Nile River valley south of the delta and the 30th parallel North. It thus consists of the entire Nile River valley from Cairo south to Lake Nasser (formed by the Aswan High Dam). Name In ancient Egypt, Upper Egypt was known as ''tꜣ šmꜣw'', literally "the Land of Reeds" or "the Sedgeland", named for the sedges that grow there. In Biblical Hebrew it was known as and in Akkadian it was known as . Both names originate from the Egyptian '' pꜣ- tꜣ- rsj'', meaning "the southern land". In Arabic, the region is called Sa'id or Sahid, from صعيد meaning "uplands", from the root صعد meaning to go up, ascend, or rise. Inhabitants of Upper Egypt are known as Sa'idis and they generally speak Sa'idi Egyptian Arabic. Geography Upper Egypt is between the Cataracts of the Nile beyond modern-day Aswan, downriver (northward) to the area of El-Ayait, which places modern- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
