Been there , done that !

[mete]

https://www.dailymail.co.uk/science...ered-China-130-000-years-earlier-thought.html
It all comes
down to either fractals or eta carbides . Simple as that !

 

[abcdef]

The thing that hath been, it is that which shall be; and that which is done is that which shall be done: and there is no new thing under the sun. google it

 

[Mo2]

I noticed one of the rocks said ZT on it.