Metal Remnants - Occurring naturally in nature, copper was known to some of the most ancient civilizations in history. It has been used for at least 10,000 years. It is estimated that it was discovered around 9000 BC in the Middle East. Gold and meteoric iron were the only metals that were used by humans before it came into use. Evidence of smelting shows up in many early cultures around the world including China before 2899 BC and South America by 600 AD. Learn more at Metalremnants.com and start building your artifacts today!