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SUMMARY ② Korea Iron & Steel Association

‘Iron’ came from space?
The secret of iron's origin

Iron is omnipresent in our lives. But where did it come from? Let's unlock the secret of its origin.

01. Origin of Iron: from the Big Bang to the birth of stars 02. When and how was iron first discovered?

Iron is one of the most important elements that make up the Earth. How did people in the distant past discover and use iron?
Formation of The first two The first five Emergence of There are three theories about the origin of iron.
primordial atoms: H2 and atoms Birth of Stars Iron
universe He
Three theories about the origin of iron

By mistake Wildfire Meteorite

The theory suggests that in the The theory suggests that a forest fire The theory suggests that meteorites
Bronze Age, people mistook hematite, caused iron ore to melt and flow. That fell to the Earth, bringing iron with them.
13.7 billion years ago, Once as hot as By pulling other 380,000 years after Like blast furnaces, stars an iron ore, as chalcopyrite, a bronze is how people became aware of it and In fact, meteorites are often found to
the ‘Big Bang,’ a fire, the primordial matters, hydrogen the Big Bang, stars constantly burn, generating ore, because they are similar in color. began to make use. contain high levels of iron.
cosmic explosion, universe gradually and helium continued were formed by atom energy. Iron was born in the They smelted the hematite in hopes
gave birth to the cooled. Then, small to repeat processes clouds that have stars that reached 4 to 6 of extracting bronze; instead, they
primordial universe. particles (quarks) of fusion and fission strong gravitational billion degrees Celsius. discovered iron.
intermixed to form to form the elements, force.
the atoms, hydrogen lithium, beryllium and
and helium. boron.

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