Short answers, pulled from the story.
Nine tiny iron beads were discovered in a burial site at Gerzeh in Lower Egypt, dating back to 3200 BC. These artifacts were crafted from meteoric iron rather than forged from earth-bound ore. Ancient peoples hammered these space rocks into shape without the need for the intense heat required to smelt terrestrial iron.
Around 1200 BC, the Mediterranean world experienced a catastrophic systemic failure known as the Bronze Age collapse. Trade routes for tin were severed, and great empires crumbled under internal strife and external invasions. Metalworkers were forced to seek alternatives to traditional bronze alloys, making iron the new standard.
Modern archaeological evidence has dismantled the theory that the Hittite Empire held a monopoly on ironworking. Iron objects from Bronze Age Anatolia are comparable in number to those found in Egypt and other contemporary regions. The spread of iron technology appears to have been a gradual process that occurred alongside the collapse of the Late Bronze Age.
Archaeological evidence suggests that iron smelting was developed independently in regions such as Nigeria, Cameroon, and the Central African Republic as early as 2000 BC. Sites like Lejja in Nigeria and Gbabiri in the Central African Republic have yielded dates for iron production that predate similar developments in Europe by centuries. The Nok culture of Nigeria practiced iron smelting from as early as 1000 BC.
The Hallstatt period spanned from 1200 to 700 BC and saw the development of flat graves and the use of polychrome pottery. The La Tène culture flourished from 450 BC to the Roman conquest and is renowned for its elaborate curvilinear designs on weapons and jewelry. The Iron Age in Europe lasted until the Roman conquests of the 1st century BC.
As early as 300 BC, high-quality steel was produced in southern India using the crucible technique. This method involved mixing high-purity wrought iron, charcoal, and glass in a crucible and heating it until the iron melted and absorbed the carbon. The result was a steel of exceptional quality known as wootz steel.