A bullet-speed experiment reveals that the Earth's inner core may be softer and more dynamic than previously thought.

Download the experiment instructions HERE! Let’s learn about the properties of liquids and solids: Solids are not compressible, they’re rigid, they don’t flow, and their particles are packed close ...

For more than a quarter century, scientists have been trying to determine the structure of a particular form of solid oxygen. X-ray analysis of the substance under high pressure now indicates that ...