I learnt not to long ago that when the Earth formed, all the iron sank down deep into the interior of the planet out of our reach. All the iron that is with us on the surface fell down to earth after planets collided and were obliterated. The iron in your blood and on the knife and fork on your table would have come from the core of a planet that was demolished in a collision with another planet. When it fell to earth the surface of the planet had hardened.
Everything that has the mass of Iron or more like copper and lead was created or freed in an extremely energetic event. Lead is mostly created when radioactive materials decayed, they slowly decayed until they reached a stable configuration as lead.
I think of home and my world all the time but it was made possible by big events.
