In this section you’ll learn some really cool facts about metal, yes believe it or not metal can be a very interesting subject. Did you know that about 60 percent of copper is used for manufacturing electrical wire and cable? Copper wire is used in power generation, transmission, distribution, telecommunication and other electrical circuits? Reduced level of magnesium in body can cause hypertension, heart disease, sleep disturbances and type2 diabetes. Silver is the best thermal conductor of all metals and the lines we see on the rear windscreen of cars that are used for defrosting and defogging are made from silver. All in all you will learn so much in the section about metals.