copper

The coins in the world are all made of metal. But already metal, of course, cannot float on the water, because the metal has a much higher specific gravity than water.

There have been many stories and studies that raise the issue that we are abusing antiseptic soaps. Triclosan, a bactericidal agent in soap, is present in toothpaste, mouthwash,

People aged 50 years or older need to consider taking measures to reduce foods that contain a lot of copper and iron.

Is there any way to make any metal become magnetic metal such as iron, cobalt and nickel?

The history of materials has evolved from the use of natural materials such as wood, stone, animal skin and other artificial materials for humans to create materials such as