Anycast allows multiple, identical, globally deployed DNS servers to advertize the same IP address. For all intents and purposes, the same server exists in dozens or hundreds of places simultaneously. When an Internet user looks up your domain name, they find the Anycast instance topologically closest to themselves. Usually, there's a correlation between network topology and physical geography.
The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in about 4000 BCE. The discovery of smelting around 3000 BCE led to the start of the iron age around 1200 BCE and the prominent use of iron for tools and weapons.
Who discovered Copper? Copper is a metal which was known to people even during the pre historic times. Due to this reason we cannot say who discovered copper but evidence found by archaeologists propose that people living between the 5000 BC and 1200 BC may have discovered the metal. It was used by the ancients for making utensils, jewelery and weapons. Some historians consider that Romans were the first to use the metal on a large scale, some 11,000 years ago. Historians have also found evidence that copper was used in ancient India for making coins, lamps, idols and utensils.