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Ancient grains is a marketing term used to describe a category of grains and pseudocereals that are purported to have been minimally changed by selective breeding over recent millennia, as opposed to more widespread cereals such as corn, rice and modern varieties of wheat, which are the product of thousands of years of selective breeding.
By 700–800 CE, small metal sculptures were common and an extensive range of gold and tumbaga ornaments constituted the usual regalia of persons of high status in Panama and Costa Rica. [38] The earliest specimen of metalwork from the Caribbean is a gold-alloy sheet carbon dated to 70–374 CE.
Metal production in the ancient Middle East. The metals of antiquity are the seven metals which humans had identified and found use for in prehistoric times in Africa, Europe and throughout Asia: [1] gold, silver, copper, tin, lead, iron, and mercury.
Those artifacts include, for example, a bead from the 5th millennium BC found in Iran [2] and spear tips and ornaments from ancient Egypt and Sumer around 4000 BC. [12] These early uses appear to have been largely ceremonial or decorative. Meteoric iron is very rare, and the metal was probably very expensive, perhaps more expensive than gold.
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Copper bells, axe heads and ornaments from various parts of Chiapas (1200–1500) on display at the Regional Museum in Tuxtla Gutierrez, Chiapas.. The emergence of metallurgy in pre-Columbian Mesoamerica occurred relatively late in the region's history, with distinctive works of metal apparent in West Mexico by roughly 800 CE, and perhaps as early as 600 CE. [1]
A new analysis of ancient grains of crystal embedded in rock from the Australian outback suggests Earth had dry land and fresh water some 4 billion years ago — a time when scientists had thought ...
While technology did advance to the point of creating surprisingly pure copper, most ancient metals are in fact alloys, the most important being bronze, an alloy of copper and tin. As metallurgical technology developed ( hammering , melting , smelting , roasting , cupellation , moulding , smithing , etc.), more metals were intentionally ...
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