Short answers, pulled from the story.
Copper was the first metal discovered by humanity and was likely used as early as 11,000 years ago. This discovery marked the beginning of a journey that transformed human history from the Stone Age to the Bronze Age.
The Bronze Age began around the fifth millennium BCE and utilized bronze, an alloy of copper and tin. Bronze was harder and more durable than pure copper, allowing for the creation of stronger tools, weapons, and armor.
Henry Bessemer introduced the Bessemer process in 1855, which allowed for the production of steel in large quantities cheaply. This process revolutionized the steel industry and led to the development of mild steel for most purposes.
Stainless steel was discovered in 1912 and provides corrosion-resistant properties to alloys. This discovery was a pivotal moment in the history of metals leading to the development of new materials and technologies.
Metallic elements up to the vicinity of iron are largely made via stellar nucleosynthesis through successive fusion reactions inside stars. Heavier elements are synthesized by neutron capture processes known as the s-process and the r-process.
95% of the energy used to make aluminum from bauxite ore is saved by using recycled material. This high efficiency makes metal recycling a critical aspect of the future of metals and environmental impact.