Physics Has Demoted Mass - Issue 54: The Unspoken

Whatever it is, we call it matter or material substance. It has a characteristic property that we call solidity. But what is matter, exactly? Imagine a cube of ice, measuring a little over one inch (or 2.7 centimeters) in length. Imagine holding this cube of ice in the palm of your hand. It is cold, and a little slippery. It weighs hardly anything at all, yet we know it weighs something.