A spear is a pole weapon consisting of a shaft, usually of wood, with a sharpened head. The head may be simply the sharpened end of the shaft itself, as is the case with bamboo spears, or it may be of another material fastened to the shaft, such as obsidian, iron or bronze. The most common design is of a metal spearhead, shaped like a triangle or a leaf.

Spears were one of the most common personal weapons from the Stone Age until the advent of firearms. They may be seen as the ancestor of such weapons as the lance, the halberd, the naginata and the pike. One of the earliest weapons fashioned by human beings and their ancestors, it is still used for hunting and fishing, and its influences can still be seen in contemporary military arsenals as the rifle-mounted bayonet.

Spears can be used as both melee and ballistic weapons. Spears used primarily for thrusting may be used with either one or two hands and tend to have heavier and sturdier designs than those intended exclusively for throwing. Those designed for throwing, often referred to as javelins tend to be lighter and have a more streamlined head, and can be thrown either by hand or with the assistance of a spear thrower such as the atalatl or woomera.

Animal use

Spear manufacture and use is also practiced by the Pan troglodytes verus subspecies of the Common Chimpanzee. Chimpanzees near Kédougou, Senegal were observed to create spears by breaking straight limbs off of trees, stripping them of their bark and side branches, and sharpening one end with their teeth. They then used the weapons to hunt galagos sleeping in hollows.Jill D. Pruetz1 and Paco Bertolani, Savanna Chimpanzees, Pan troglodytes verus, Hunt with Tools", Current Biology, March 6, 2007. Orangutans have also used spears to fish after observing humans fishing in a similar manner.[http://www.dailymail.co.uk/pages/live/articles/technology/technology.html?in_article_id=562236&in_page_id=1766&ito=1490 Orangutan attempts to hunt fish with spear, April 26, 2008

Prehistory

Neanderthals were constructing stone spear heads from as early as 300,000 BP. By 250,000 years ago wooden spears were made with fire-hardened points. From 200,000 BP Middle Paleolithic humans began to make complex stone blades which were used as spear heads. At these times there was still a clear difference between spears designed to be thrown and those designed to be used in hand to hand combat.