Sweden has its own variation of this tradition; before a wedding, the brideâs mother gives her a gold coin to put in her right shoe and the brideâs father gives her a silver coin to put in her left shoe. The coins represent their wish that she will never be without.
There are a few rocks around that are 4.5 billion years old. Most meteorites are about that old too. The previous star that went nova and left us all these rocks and stuff pretty much cleared the area of older stuff. The Sun is a 3rd generation star.
The oldest rocks on the ocean floor are 200 mya â very young when compared with the oldest continental rocks, which date from 3.8 billion years ago. In order to collect paleomagnetic data dating beyond 200 mya, scientists turn to magnetite-bearing samples on land to reconstruct the Earth's ancient field orientation.