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.
Iron has been known since ancient times. The first iron used by humans is likely to have come from meteorites. Most objects that fall to earth from space are stony, but a small proportion, such as the one pictured, are âiron meteoritesâ with iron contents of over 90 percent.