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Thewheel, invented sometime before the 4th millennium BC, is one of the most ubiquitous and important technologies. This detail of the "Standard of Ur", c. 2500 BCE., displays a Sumerianchariot

Technology is the application ofconceptual knowledge to achieve practicalgoals, especially in areproducible way. The wordtechnology can also mean the products resulting from such efforts, including both tangibletools such asutensils ormachines, and intangible ones such assoftware. Technology plays a critical role inscience,engineering, andeveryday life.

Technological advancements have led to significant changes in society. The earliest known technology is thestone tool, used duringprehistory, followed by thecontrol of fire—which in turn contributed to thegrowth of thehuman brain and the development oflanguage during theIce Age, according to thecooking hypothesis. The invention of thewheel in theBronze Age allowed greater travel and the creation of more complex machines. More recent technological inventions, including theprinting press, telephone, and theInternet, have lowered barriers to communication and ushered in theknowledge economy. (Full article...)

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Entries here consist ofGood andFeatured articles, which meet a core set of high editorial standards.

  • Image 1 King's Highway 73, commonly referred to as Highway 73, was a provincially maintained highway in the Canadian province of Ontario. The route began in Port Bruce and progressed north through Aylmer, encountering Highway 401 immediately before terminating east of Dorchester. The route was established in mid-1937, remaining unchanged for nearly six decades before being transferred to Elgin County and Middlesex County in 1997 and 1998. Today the route is known as Elgin County Road 73 and Middlesex County Road 73. (Full article...)
    Image 1
    King's Highway 73, commonly referred to asHighway 73, was aprovincially maintained highway in theCanadian province ofOntario. The route began inPort Bruce and progressed north throughAylmer, encounteringHighway 401 immediately before terminating east ofDorchester. The route was established in mid-1937, remaining unchanged for nearly six decades before being transferred toElgin County andMiddlesex County in 1997 and 1998. Today the route is known asElgin County Road 73 andMiddlesex County Road 73. (Full article...)
  • Image 2 M-76 is a former state trunkline highway designation in the Lower Peninsula of the US state of Michigan. The highway's designation was decommissioned when the last section of it was converted to freeway as a part of the present-day Interstate 75 (I-75). At that time, M-76 extended from US Highway 23 (US 23) near Standish northwesterly to I-75 south of Grayling. Two sections of the route followed freeways with a two-lane highway in between to connect them. The former routing of M-76 through West Branch before that city was bypassed was initially redesignated Business M-76 (Bus. M-76). The highway itself ran through mixed fields and forests bypassing several other towns in the region. First designated by 1919, M-76 initially terminated at Roscommon. It was later extended north through Grayling and west to Kalkaska in the 1920s. A second, disconnected, segment was added to the highway in the 1930s. By the early 1940s, both the disconnected section and the Kalkaska–Grayling were added to M-72. M-76 was converted in stages into a freeway in the late 1960s and early 1970s. When the last segment was completed, the number was removed from the highway, and the freeway was added to I-75. (Full article...)
    Image 2
    M-76 is a formerstate trunkline highway designation in theLower Peninsula of the US state ofMichigan. The highway's designation wasdecommissioned when the last section of it was converted to freeway as a part of the present-dayInterstate 75 (I-75). At that time, M-76 extended fromUS Highway 23 (US 23) nearStandish northwesterly to I-75 south ofGrayling. Two sections of the route followed freeways with a two-lane highway in between to connect them. The former routing of M-76 throughWest Branch before that city was bypassed was initially redesignatedBusiness M-76 (Bus. M-76). The highway itself ran through mixed fields and forests bypassing several other towns in the region.

    First designated by 1919, M-76 initially terminated atRoscommon. It was later extended north through Grayling and west toKalkaska in the 1920s. A second, disconnected, segment was added to the highway in the 1930s. By the early 1940s, both the disconnected section and the Kalkaska–Grayling were added toM-72. M-76 was converted in stages into a freeway in the late 1960s and early 1970s. When the last segment was completed, the number was removed from the highway, and the freeway was added to I-75. (Full article...)
  • Image 3 Razer as it appeared in series 6 of Robot Wars, featuring a piercing arm and wedge Razer is a combat robot that competes on the British television series Robot Wars. It was constructed by Simon Scott and Ian Lewis from Bournemouth; the team later expanded to include webmaster Vincent Blood. Razer was designed and constructed in 1998 to participate in the second series of Robot Wars, but subsequent modifications and improvements enabled it to remain competitive until its retirement after the second series of Robot Wars Extreme. Despite gaining a reputation for being unreliable, it was champion of the fifth series of Robot Wars, runner-up in the sixth, and won the first two Robot Wars World Championships. Razer's weapon is a piercing arm which exerts approximately three tonnes of pressure per square inch (465 kg/cm2, 45.6 MPa) at its tip. The arm was designed to pierce opponents' armour plating and break their internal components, rendering them impaired or immobile. This weapon was inspired by the principle of the fly press—a piece of machinery used to bend and pierce metal—and maximises damage through the use of hydraulics. The arm is also an integral element of Razer's winged self-righting mechanism, which rolls the robot back onto its wheels if inverted. In later series of Robot Wars, an interchangeable hook was attached to the arm to lift robots immune from being pierced. The popularity of crushing and piercing weaponry in robot combat events is attributed to Razer, which inspired many imitations. (Full article...)
    Image 3

    Razer as it appeared in series 6 ofRobot Wars, featuring a piercing arm and wedge

    Razer is acombat robot that competes on the British television seriesRobot Wars. It was constructed by Simon Scott and Ian Lewis fromBournemouth; the team later expanded to include webmaster Vincent Blood. Razer was designed and constructed in 1998 to participate in the second series ofRobot Wars, but subsequent modifications and improvements enabled it to remain competitive until its retirement after the second series ofRobot Wars Extreme. Despite gaining a reputation for being unreliable, it was champion of the fifth series ofRobot Wars, runner-up in the sixth, and won the first twoRobot Wars World Championships.

    Razer's weapon is a piercing arm which exerts approximately three tonnes of pressure per square inch (465 kg/cm2, 45.6 MPa) at its tip. The arm was designed to pierce opponents' armour plating and break their internal components, rendering them impaired or immobile. This weapon was inspired by the principle of thefly press—a piece of machinery used to bend and pierce metal—and maximises damage through the use ofhydraulics. The arm is also an integral element of Razer's winged self-righting mechanism, which rolls the robot back onto its wheels if inverted. In later series ofRobot Wars, an interchangeable hook was attached to the arm to lift robots immune from being pierced. The popularity of crushing and piercing weaponry in robot combat events is attributed to Razer, which inspired many imitations. (Full article...)
  • Image 4 View of the subway platforms and mezzanine at night The Howard Beach–JFK Airport station is a local subway/people mover station complex located at Coleman Square between 159th Avenue and 103rd Street in Howard Beach, Queens. The New York City Subway portion of the station is on the IND Rockaway Line and is served by the Rockaway branch of the A train at all times and the Rockaway Park Shuttle in the summertime on weekends during the day. The AirTrain JFK portion of the station complex is served by the AirTrain's Howard Beach branch at all times. The station was originally a Long Island Rail Road (LIRR) station along the Rockaway Beach Branch. The LIRR station opened in 1913 to replace the nearby Ramblersville station. The LIRR ceased operations at this station in 1950, and the New York City Transit Authority bought the section of the Rockaway Beach Branch that included this station in 1952. The subway station opened on June 28, 1956. Between 2000 and 2003, the subway station was completely reconstructed and the AirTrain JFK station was built. The rebuilt complex was completed on December 17, 2003, providing a rail link from the Howard Beach station to JFK Airport. (Full article...)
    Image 4

    View of the subway platforms and mezzanine at night

    TheHoward Beach–JFK Airport station is a localsubway/people mover station complex located at Coleman Square between 159th Avenue and 103rd Street inHoward Beach, Queens. TheNew York City Subway portion of the station is on theIND Rockaway Line and is served by the Rockaway branch of theA train at all times and theRockaway Park Shuttle in the summertime on weekends during the day. TheAirTrain JFK portion of the station complex is served by the AirTrain's Howard Beach branch at all times.

    The station was originally aLong Island Rail Road (LIRR) station along theRockaway Beach Branch. The LIRR station opened in 1913 to replace the nearbyRamblersville station. The LIRR ceased operations at this station in 1950, and theNew York City Transit Authority bought the section of the Rockaway Beach Branch that included this station in 1952. The subway station opened on June 28, 1956. Between 2000 and 2003, the subway station was completely reconstructed and the AirTrain JFK station was built. The rebuilt complex was completed on December 17, 2003, providing a rail link from the Howard Beach station toJFK Airport. (Full article...)
  • Image 5 Entrance on The Broadway Elm Park is a London Underground station in the Elm Park neighbourhood of the London Borough of Havering, East London. It is on the District line between Dagenham to the west and Hornchurch to the east. It is 4 kilometres (2.5 mi) along the line from the eastern terminus at Upminster and 20.7 kilometres (12.9 mi) from Tower Hill in Central London. The station was opened by the London, Midland and Scottish Railway on 13 May 1935 with an official opening ceremony on 18 May 1935. The station was refurbished by Metronet in 2005 and 2006. It was the last infill station on the London Underground until 2008. The station is of a similar design to those constructed at Dagenham Heathway and Upney. It is in London fare zone 6. (Full article...)
    Image 5

    Entrance on The Broadway

    Elm Park is aLondon Underground station in theElm Park neighbourhood of theLondon Borough of Havering, East London. It is on theDistrict line betweenDagenham to the west andHornchurch to the east. It is 4 kilometres (2.5 mi) along the line from the eastern terminus at Upminster and 20.7 kilometres (12.9 mi) fromTower Hill inCentral London. The station was opened by theLondon, Midland and Scottish Railway on 13 May 1935 with an official opening ceremony on 18 May 1935. The station was refurbished byMetronet in 2005 and 2006. It was the lastinfill station on the London Underground until 2008. The station is of a similar design to those constructed atDagenham Heathway andUpney. It is inLondon fare zone 6. (Full article...)
  • Image 6 Amtrak's livery has included a variety of designs, most based on a red, white, and blue color scheme. The lead locomotive here is in Phase II livery, while the trailing locomotive is still in Phase I. Amtrak has used a variety of paint schemes (liveries) on its rolling stock since taking over intercity passenger rail service in the United States in 1971. A series of seven schemes termed Phases, first introduced in 1972, have seen the widest use. Phases primarily use geometric arrangements of red, white, and blue—the national colors of the United States—part of Amtrak's patriotic visual identity. Amtrak began operations in May 1971 with a mixture of equipment still painted in the distinct colored liveries of the freight railroads that relinquished their passenger service to Amtrak. The company retained the equipment that it determined to be in the best condition, and elected not to keep the same rolling stock on the same routes. Since this resulted in trains with mismatched liveries, which contrasted with the previous coordinated liveries, that period was later known as the Rainbow Era. (Full article...)
    Image 6
    A passenger train led by two diesel locomotives. The first locomotive has a black roof, light gray sides, and red and blue horizontal stripes separated by a thin white stripe. The second locomotive has a black roof, gray sides, and a red-and-blue Amtrak logo on the side.
    Amtrak's livery has included a variety of designs, most based on a red, white, and blue color scheme. The lead locomotive here is in Phase II livery, while the trailing locomotive is still in Phase I.


    Amtrak has used a variety of paint schemes (liveries) on itsrolling stock since taking over intercity passenger rail service in theUnited States in 1971. A series of seven schemes termedPhases, first introduced in 1972, have seen the widest use. Phases primarily use geometric arrangements of red, white, and blue—thenational colors of the United States—part of Amtrak's patriotic visual identity.

    Amtrak began operations in May 1971 with a mixture of equipment still painted in the distinct colored liveries of the freight railroads that relinquished their passenger service to Amtrak. The company retained the equipment that it determined to be in the best condition, and elected not to keep the same rolling stock on the same routes. Since this resulted in trains with mismatched liveries, which contrasted with the previous coordinated liveries, that period was later known as the Rainbow Era. (Full article...)
  • Image 7 Kansas Highway 92 in western Leavenworth, Kansas K-92 is an approximately 44-mile-long (71 km) state highway in the U.S. state of Kansas. K-92's western terminus is at K-4 south of the community of Rock Creek, and the eastern terminus is a continuation as Missouri State Route 92 at the Missouri border by the City of Leavenworth. K-92 is co-designated as U.S. Route 59 (US-59) in Oskaloosa, K-16 from Oskaloosa to McLouth, and K-7 and US-73 in Leavenworth. The majority of the route passes through rural farmland and is almost entirely a two-lane roadway, except for the overlap with K-7 and US-73 and a portion of the US-59 overlap, which are four-lane. In the 1850s, a military road was built connecting Fort Riley with Fort Leavenworth, which K-92 follows or closely follows. Before state highways were numbered in Kansas there were auto trails. K-92's western terminus (K-4) was part of the former Southwest Trail. The section of the highway that overlaps K-7 and US-73 closely follows or was part of the George Washington National Highway and former King of Trails. The section of K-92 that overlaps with US-59 was part of the former Southwest Trail and former Corn Belt Route. K-92 was first designated as a state highway in 1926. At that time it began at K-16 south of Oskaloosa and ran east to the Missouri border. Between 1931 and 1932, the highway was extended further west to end at K-4 south of Rock Creek. In the mid 1950s, K-92 was realigned in Leavenworth to cross the new bridge over the Missouri River. In the mid 1960s, the highway was rerouted slightly to make room for Perry Lake, which was being constructed by the US Army Corps of Engineers. (Full article...)
    Image 7
    Kansas Highway 92 in western Leavenworth, Kansas

    K-92 is an approximately 44-mile-long (71 km)state highway in the U.S. state ofKansas.K-92's western terminus is atK-4 south of the community ofRock Creek, and the eastern terminus is a continuation asMissouri State Route 92 at theMissouri border by the City ofLeavenworth.K-92 isco-designated asU.S. Route 59(US-59) inOskaloosa,K-16 from Oskaloosa toMcLouth, andK-7 andUS-73 in Leavenworth. The majority of the route passes through rural farmland and is almost entirely a two-lane roadway, except for the overlap withK-7 andUS-73 and a portion of theUS-59 overlap, which are four-lane.

    In the 1850s, amilitary road was built connectingFort Riley withFort Leavenworth, whichK-92 follows or closely follows. Before state highways were numbered in Kansas there wereauto trails.K-92's western terminus(K-4) was part of the former Southwest Trail. The section of the highway that overlapsK-7 andUS-73 closely follows or was part of theGeorge Washington National Highway and former King of Trails. The section ofK-92 that overlaps withUS-59 was part of the former Southwest Trail and former Corn Belt Route.K-92 was first designated as a state highway in 1926. At that time it began atK-16 south of Oskaloosa and ran east to the Missouri border. Between 1931 and 1932, the highway was extended further west to end atK-4 south of Rock Creek. In the mid 1950s,K-92 was realigned in Leavenworth to cross the new bridge over theMissouri River. In the mid 1960s, the highway was rerouted slightly to make room forPerry Lake, which was being constructed by theUS Army Corps of Engineers. (Full article...)

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