Is all that important in some way?
Cheers!
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duke_of_urls say: Yes.
There is no other way for iron to exist. It is only made in stars, and only those stars that explode spread their iron into space.
The same thing is true of every other kind of atom heavier than lithium (#3). All of it comes from stars that exploded.
That's a lot of exploding, innit?
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Bill say: All the Elements except for Hydrogen were formed in Stars or when the Stars Exploded.
You star off with Hydrogen and when you have enough of it a gas giant forms and soon due to Gravity Nuclear Fusion Starts and you have a SUN/STAR. Fuse two atoms of Hydrogen and you have Helium and the process continues and soon about a few billion years you have all the elements.
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Brilliant Answer say: This is a a very difficult question and nearly impossible to ask a search engine to answer.
What phrase could you even enter in a search engine to find out? See? Impossible.And science is woefully unprepared to answer the WHY? of anything.
Edison said once, "We don;t know a millionth of a percent about anything." I add we know ZERO percent the why.
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CarolOklaNola say: Not necessarily 4 billion years ago, but yes. all the iron in your blood and all the magnesium in chlorophyll DOES come form stars that have blown up AT VARIOUS TIMES when they went supernova.. Only FOUR elements on the periodic table were made during the first years right after the Big bang, Hydrogen, helium a small amount of lithium and even smaller amount of beryllium.. ALL of the other NATURAL elements were synthesized in the cores of stars. That includes nitrogen, carbon oxygen, Silicon, Aluminum magnesium AND iron.
Anyone who claims they have had no luck doing research simply doesn't KNOW HOW TO USE A SEARCH ENGINE. or you are TOO LAZY to USE YOUR OWN BRAIN. You want exploit someone else for the THEIR knowledge. NO WAY. I charge a CONSULTING FEE. if you want me to do your research FOR YOU. If you are TOO LAZY to USE YOUR BRAIN, suffer the consequences AND EXPENSES of being ignorant. Ignorance is MALADAPTIVE.