copper metal | scienceinfo.net

Discovered a place containing a giant 'red treasure' many times larger than an underground mine, which can be recycled infinitely
A 97-year-old mining company is turning what would otherwise be discarded in drawers and landfills into a precious material the world needs.
Sensors detect copper in the body
Just one drop of serum, the sensor can detect the existence of excessive allowed copper by displaying a light pink color.