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Darts are airborne ranged weapons. They are designed to fly such that a sharp, often weighted point will strike first. They can be distinguished from javelins by the presence of fletching (feathers on the tail) and a shaft that is shorter and/or more flexible. Darts can be propelled by hand or with the aid of a hand-held implement such as a blowgun. They can be distinguished from arrows because they are not used with a bow.
Darts have been used since pre-history. The plumbatae were lead-weighted darts thrown by infantrymen in Antiquity and the Middle Ages. Darts can be propelled by a number of means. The atlatl uses leverage to increase the velocity of the dart, the kestros increases the range of propelled darts using a sling, and the exhalation of a person's breath through a blowgun propels small stone points or poisoned needles with pneumatic force.
In the modern era, darts have been used for recreation; in lawn darts and the game of darts.
Some of the earliest evidence of advanced tool use includes remnants of an early type of dart, which can be considered the ancestor of arrows as well as bows. Reconstructions of this system have a range of over one hundred metres (yards) and can penetrate several centimetres of oak. This technology was used worldwide from the Upper Palaeolithic (late Solutrean, c. 18,000–16,000 BC) until the development of archery made it obsolete.
The darts in question are much larger than arrows, but noticeably lighter than javelins. They have a weighted point, often of stone, on a removable foreshaft. This is held by friction onto a thin, flexible main shaft a few metres in length, with fletching and a (usually socket-like) nock at the opposite end. Since they are unlike anything in Western history, the term "dart" has been adopted after some debate. Some alternate terms for this missile have included the spear, but this term has fallen out of favour since in all other uses, spears are stiff enough to be used for stabbing. In its function, an atlatl dart is more like a combination between a bow and an arrow.
Its similarity to a bow may not be immediately obvious, but in fact both serve to accumulate energy by elasticity in a similar way. As throwing begins, a dart of this type is designed to flex in compression between the accelerating force at its nock and the inertia of its weighted point, storing energy. Late in this throw, as the point moves faster and so offers less resistance, the dart releases most of this energy by springing away from the thrower. Some energy may also be recovered by the fletching as the projectile "fishtails" through the air. However, this energy is far less than is commonly stated and only effectively increases accuracy by counteracting the downward force on the tail.
To maximize elastic energy storage and recovery, such darts should be held only by the nock and allowed to pivot as they are thrown. This requires a special tool called a spear-thrower. In Western culture these might be called atlatl borrowed from the Aztec, or in Australia the Aboriginal word woomera is used.
Plumbatae or martiobarbuli were lead-weighted darts carried by infantrymen in Antiquity and the Middle Ages. The first examples seem to have been carried by the Ancient Greeks from about 500 B.C. onwards, but the best-known users were from the Roman and Byzantine armies. The best written source for these tactical weapons is Vegetius's treatise known as De Re Militari (1.17):
In Europe, the spear-thrower was supplemented by the bow and arrow in the Epipaleolithic period. By the Iron Age, the amentum, a strap attached to the shaft, was the standard European mechanism for throwing lighter javelins. The amentum gives not only range, but also spin to the projectile. 
Archery may be easier to learn and have a faster rate of fire, yet perhaps this system's greatest advantage over the spear-thrower is that ammunition is easier to make and transport. Since the dart must store almost all of the system's elastic energy, more care, planning, and weight of elastic material must be invested in its construction. In archery, the bulk of elastic energy is stored in the throwing device, rather than the projectile; arrow shafts can therefore be much smaller, and have looser tolerances for spring constant and weight distribution than spear-thrower darts. For example, stone dart points from the same set tend to vary in mass by no more than a few percent, and computer simulations show that this is necessary for efficient operation. Similar constraints exist for the length, diameter, and materials quality of the shaft. If the same amount of attention and material are instead invested into a bow, projectiles can be made lighter (by a factor of five or more) and to less exacting tolerances. This allowed for more forgiving flint knapping.
Greater mass becomes an advantage over archery when penetration is an overwhelming concern, as when harpooning sea mammals. This class of dart was used by aboriginal Arctic hunters such as the Aleut until fairly recently.
Darts, plumbata and atlatls have been constructed by modern enthusiasts, either with ancient materials and methods or with high technology borrowed from modern archery. While some do this in the context of anthropology or mechanical engineering, many view the practice as a sport, and throw competitively for distance and/or for accuracy. Throws of almost 260 m (850 ft) have been recorded. 
The darts in use by the developers of the English language were used throughout Europe for much of its military history, though they were never a dominant weapons technology. They have also lent their name to quite a few weapons from other cultures.
It is quite reasonable to speculate the darts used with atlatls were adapted from hand-thrown darts, which in turn were derived from light javelins. In Europe, short but heavy-pointed darts were sometimes used in warfare. These had a length of about 30 to 60 cm (0.98 to 1.97 ft) and resembled an arrow with a long head and short shaft.
The Roman model, the plumbata , was weighted with lead.  In some legions, five of these were carried inside each soldier's shield; reconstructions show a range of 70 m (77 yd) or more when thrown overhand in the fashion of a German stick grenade.
Feathered spears, often called darts or javelins, were used in medieval and Renaissance Europe, both as ceremonial objects and as weapons. It is possible no examples have survived, presumably due to their fragility or the deterioration of their fletching making them indistinguishable from spears, but they appear in multiple illustrations from the 15th and 16th century. As ceremonial items, they are shown held similar to scepters by military commanders and leaders such as Emperor Maximilian I.   Many other illustrations show large darts being wielded as weapons, either on the battlefield or in smaller engagements such as judicial battles.  Depictions show them as being four to seven feet long, with arrow-like feather fletching, barbed points and thick shafts comparable to conventional polearms, presumably able to serve for both throwing and hand-held striking. One such example has historically been depicted on French and English pattern playing cards, where the jack of clubs is armed with one.   
Some later artistic depictions suggest they may have also been used for hunting. 
The kestrosphendone, or kestros, was a sling-launched dart, invented in 168 BC for the Third Macedonian War, probably similar to hand-thrown darts of the period. Casting one (according to surviving records) requires a specially designed sling with two unequal loops, though it is not clear whether this is a stave-sling or more closely resembles a shepherd's sling.
The blowgun can be used to fire darts, as well. Often, these are quite small, and do little harm by themselves; instead, they are effective due to poison spread onto their points, from (for example) dart frogs or curare.
This is a pointed weight attached at its blunt end to a length of rope or chain, which can be used to throw and retrieve it. It meets the definition above because it flies freely when no tension is applied to the rope, has a point and – in the form of a square of cloth – even has fletching. Shengbiao is a discipline of Wushu devoted to its use.
A Swiss arrow (also known as a Yorkshire arrow) is a dart thrown using a cord to make the dart go farther with the same power.
Of the darts still in widespread use, perhaps the closest to traditional thrown darts are lawn darts. These are large and heavy enough to be thrown by swinging, and to seriously wound a person when thrown. 
An indoor game of darts has also been developed. For competitive purposes, a dart cannot weigh more than 50 g (1+3⁄4 oz) including the shaft and flight and cannot exceed a total length of 300 mm (11+3⁄4 in).   They are designed to penetrate dart boards.
Tranquilizer darts are related to the darts for blowguns, but include a hypodermic needle and a hollow reservoir resembling a syringe, which is generally filled with sedatives or other drugs. These are launched from a dart gun using compressed gas, a tuft of fibers at the back of the missile serving as both fletching and wadding.
A type of dart still finds use in military engagements, in the form of flechettes. These are all-metal projectiles, often resembling nails that have had fletching (rather than nail heads) forged into them. They were used by American forces during the wars in Korea and Vietnam, but treaties have since been enacted to limit their use.
Large flechettes are used as kinetic energy penetrators in many gun-fired anti-armour projectiles.
Archery is the sport, practice, or skill of using a bow to shoot arrows. The word comes from the Latin arcus, meaning bow. Historically, archery has been used for hunting and combat. In modern times, it is mainly a competitive sport and recreational activity. A person who practices archery is typically called an archer, bowman, or toxophilite.
A bolt or quarrel is a dart-like projectile used by crossbows. The name "quarrel" is derived from the French word carré, meaning square, referring to their typically square heads. Although their lengths vary, bolts are typically shorter and heavier than traditional arrows shot with longbows.
An arrow is a fin-stabilized projectile launched by a bow. A typical arrow usually consists of a long, stiff, straight shaft with a weighty arrowhead attached to the front end, multiple fin-like stabilizers called fletchings mounted near the rear, and a slot at the rear end called a nock for engaging the bowstring. A container or bag carrying additional arrows for convenient reloading is called a quiver.
In North American archaeological terminology, a projectile point is an object that was hafted to a weapon that was capable of being thrown or projected, such as a javelin, dart, or arrow. They are thus different from weapons presumed to have been kept in the hand, such as knives, spears, axes, hammers, and maces.
A spear-thrower, spear-throwing lever or atlatl is a tool that uses leverage to achieve greater velocity in dart or javelin-throwing, and includes a bearing surface which allows the user to store energy during the throw.
Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially ranged weapon munitions such as bullets, unguided bombs, rockets or the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance.
The bow and arrow is a ranged weapon system consisting of an elastic launching device (bow) and long-shafted projectiles (arrows). Humans used bows and arrows for hunting and aggression long before recorded history, and the practice was common to many prehistoric cultures. They were important weapons of war from ancient history until the early modern period, where they were rendered increasingly obsolete by the development of the more powerful and accurate firearms. Today, bows and arrows are mostly used for hunting and sports.
An arrowhead or point is the usually sharpened and hardened tip of an arrow, which contributes a majority of the projectile mass and is responsible for impacting and penetrating a target, as well as to fulfill some special purposes such as signaling.
A Swiss arrow is a weapon similar to an arrow, but thrown with a lanyard, retained via a small notch close to the fletching. It is very similar to an amentum and uses the same principle as a spear-thrower.
Fletching is the fin-shaped aerodynamic stabilization device attached on arrows, bolts, darts, or javelins, and are typically made from light semi-flexible materials such as feathers or bark. Each piece of such fin is a fletch, also known as a flight or feather. A fletcher is a person who attaches fletchings to the shaft of arrows.
A ranged weapon is any weapon that can engage targets beyond hand-to-hand distance, i.e. at distances greater than the physical reach of the user holding the weapon itself. The act of using such a weapon is also known as shooting. It is sometimes also called projectile weapon or missile weapon because it typically works by launching solid projectiles ("missiles"), though technically a fluid-projector and a directed-energy weapon are also ranged weapons. In contrast, a weapon intended to be used in hand-to-hand combat is called a melee weapon.
Plumbatae or martiobarbuli were lead-weighted darts carried by infantrymen in Antiquity and the Middle Ages.
The throwing stick or throwing club is a wooden rod with either a pointed tip or a spearhead attached to one end, intended for use as a weapon. A throwing stick can be either straight or roughly boomerang-shaped, and is much shorter than the javelin. It became obsolete as slings and bows became more prevalent, except on the Australian continent, where the native people continued refining the basic design. Throwing sticks shaped like returning boomerangs are designed to fly straight to a target at long ranges, their surfaces acting as airfoils. When tuned correctly they do not exhibit curved flight, but rather they fly on an extended straight flight path. Straight flight ranges greater than 100 meters have been reported by historical sources as well as in recent research.
An amentum was a leather strap attached to a javelin used in ancient Greek athletics, hunting, and warfare, which helped to increase the range and the stability of the javelin in flight. Stability in flight was important because it allowed the javelin to land on its point, which was the only way the throw could be accurately recorded in competition or be useful against a live target. An amentum also increased the effective length of the throwing arm, as does a spear-thrower, and so enhanced speed.
Hunting weapons are weapons designed or used primarily for hunting game animals for food or sport, as distinct from defensive weapons or weapons used primarily in warfare.
A javelin is a light spear designed primarily to be thrown, historically as a ranged weapon, but today predominantly for sport. The javelin is almost always thrown by hand, unlike the sling, bow, and crossbow, which launch projectiles with the aid of a hand-held mechanism. However, devices do exist to assist the javelin thrower in achieving greater distance, such as spear-throwers or the amentum.
This is a list of archery terms, including both the equipment and the practice. A brief description for each word or phrase is also included.
Native American weaponry was used by Native American warriors to hunt and to do battle with other Native American tribes and European colonizers.
Throwing is an action which consists in accelerating a projectile and then releasing it so that it follows a ballistic trajectory, usually with the aim of impacting a remote target. This action is best characterized for animals with prehensile limbs: in this case the projectile is grasped, while the limb segments impart a motion of the hand through compounded mechanical advantage. For other animals, the definition of throwing is somewhat unclear, as other actions such as spitting or spraying may or may not be included.
Lawn darts can cause skull punctures and other serious injuries.