“I was ‘born’ over 10,000 years ago from ores and has been a loyal friend of humans for at least 8,000 years in different states. I exist in the liver, brain, heart, kidneys and skeletal muscles of human bodies but you’ve probably never had a chance to meet me face to face. Besides that, you can also see me in electrical wire, cooking pots and pans, pipes and tubes, automobile radiators, and many others.”