More than 200 billion pennies are estimated to be in active circulation throughout the United States today. Last month, ...

The film explains the concept of chemical changes, where two or more materials combine to form entirely different substances. It highlights everyday examples of chemical changes, such as burning wood ...

Curiosity about a mistake that left tiny dots on a germanium wafer with evaporated metal films led to the discovery of beautiful spiral patterns etched on the surface of the semiconductor by a ...