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The History Of Drone Technology
2014-05-26 09:05:12

Drones, also known as unmanned aerial vehicles (UAV), are pilotless and non-crewed aircraft that are capable of flight either by remote control or through the use of on-board computers. Other names for these types of aircraft are remotely piloted vehicle (RPV), remotely piloted aircraft (RPA), and remotely operated aircraft (ROA). Drones are commonly used by the military, but are also being...

General Atomics MQ-9 Reaper
2013-10-03 13:25:05

The General Atomics MQ-9 Reaper, once known as the Predator B, is an unmanned aerial vehicle or UAV that was created by the General Atomics Aeronautical Systems (GA-ASI) for the United States Air Force. Air Force members refer to the MQ-9 and other UAVs, also known as drones, as Remotely Piloted Vehicles/Aircraft (RPV/RPA) because humans can control them, but they are capable of autonomous...

Northrop Grumman MQ-8 Fire Scout
2013-09-24 15:48:13

The Northrop Grumman MQ-8 Fire Scout is an unmanned autonomous helicopter that is used by the United States Armed Forces for reconnaissance missions, situational awareness, and targeting assistance for ground, air, and sea bound soldiers. There are four variants of this UAV, two of which were derived from Schweizer helicopters. The first MQ-8 version, known as the RQ-8A, was used after the...

Comet goldfish
2007-04-10 13:51:34

The Comet is a commonly kept form of goldfish, the only type to have originated in the United States. They first appeared in the ponds of the Fish Commission in Washington in the early 1880s. Hugo Mullertt was the first person to bring the Comet goldfish to the market in a large quantity. Characterized by a long, tall, flowing tailfin they can be differentiated from the common goldfish,...

Pallid Harrier
2006-03-01 12:05:00

The Pallid Harrier (Circus macrourus) is a migratory bird of prey of the harrier family. It can be found in southern parts of eastern Europe and central Asia and winters mainly in India and southeast Asia. It is a very rare visitor to Great Britain and western Europe, although remarkably a juvenile wintered in Norfolk in the winter of 2002-2003. This medium-sized raptor breeds on open...

Marsh Harrier
2006-03-01 11:47:36

Marsh Harriers are birds of prey in the harrier subfamily Circus. They are medium-sized raptors and the largest and broadest-winged of all harriers. All breed in dense reedbeds. Most authorities recognize three separate but closely related species: Western Marsh Harrier (Circus aeruginosus) Eastern Marsh Harrier (C. spilonotus Swamp Harrier (C. approximans) They were once thought...

Montagus Harrier
2006-03-01 11:15:37

The Montagu's Harrier (Circus pygargus) is a migratory bird of prey of the harrier family. It can be found throughout southern Eurasia. In winter it migrates to Africa. This medium-sized raptor breeds on warm, dry, sunny open lowland plains, heathland and croplands. This typical harrier has long wings which it holds in a shallow V during its low flight. It also resembles other harriers in...

Word of the Day
ecotone
  • A transitional zone between two communities containing the characteristic species of each.
The word 'ecotone' comes 'eco-' plus a Greek root meaning 'tension'.