COLUMBIA, S.C. — This experiment is a chemistry experiment that involves a reaction between copper and oxygen, also know as an oxidation reaction. To do this experiment, you will need: pennies a sheet ...

Pennies, which are made out of a metal called Copper, are bright and shiny when first made. When copper mixes with oxygen it causes a chemical reaction that can turn the pennies brown or green and ...

We aren’t here to praise the penny, but rather, to bury it. The penny, and its counterparts, have been vanishing all around the world as the cost of minting one far outweighs its value. But hackers ...