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.
1 Iron is an element that has been known in its pure form for at least 5,000 years. 2  The name iron comes from the Anglo-Saxon word iron and Scandinavian iarn for the metal.ron is one of the elements you encounter in pure form. It is essential for nutrition and used in a variety of household objects. Here are some quick facts about iron. You can find detailed information about iron on the iron facts page.