The exact nature of copper's discovery is unknown, and historians do not know who first discovered it. People have used copper for a very long time, and along with gold, it was one of the first metals ever discovered and used by humans. Archaeologists suspect that copper was first discovered in the Middle East around 9000 B.C.Continue Reading
Part of the reason that archaeologists do not know who discovered copper first or where the discovery was made is that copper is such a ubiquitous metal. Copper is found in large reserves throughout the Earth. Modern humans mine copper in the United States, China, Zambia, Zaire, Canada and Peru. Copper is usually mined from the ground as an ore or an impure mineral. It must then be purified and smelted so that it can be used to make objects. Israel, Jordan and Egypt have the oldest copper smelting sites ever discovered. These smelting facilities were likely active around 4500 B.C.
Copper has a number of uses, and ancient people made coins, vases, weapons and jewelry with it. The ancient Egyptians used copper to make water-carrying vessels, and some of them are still functional nearly 5,000 years later. Modern humans use copper as an electrical conductor to make water pipes and for some coins. Copper is the second best conductor for electricity and is very resistant to corrosion.Learn more about Ancient History
The solubility of copper depends on the nature of the copper compound and the solvent used. In its metallic state, copper is soluble in nitric acid and sulphuric acid at a high temperature. Some copper salts are soluble in water.Full Answer >
Copper, a naturally-occurring and abundant element, was likely first encountered by our Stone Age ancestors in the Middle East before the rise of written history. It is believed to have been one of the first metals ever worked by human beings, with its use dating back at least 10,000 years.Full Answer >
Important aspects of Turkish history include first settlers in the area around 2000 B.C. followed by a series of empires starting in the 3rd century B.C. and lasting throughout 1157 A.D. The Ottoman Empire rose in 1299 and lasted until 1923.Full Answer >
Scientists can't say for sure what caused the extinction of the dinosaurs, but theories suggest that diseases, climatic change, geologic events and changing plant communities may be to blame. Scientists say that dinosaurs, along with 50 percent of all other life on Earth, died out around 65 million years ago.Full Answer >