In January 1993, a gunman murdered seven people in a fast-food restaurant in Palatine, a suburb of Chicago. In his dual roles as an administrative executive and spokesperson for the police department, ...

Carbon is made up of just one type of atom close atomThe smallest particle of an element. We often think of atoms as tiny spheres, but in fact they are made from smaller particles called protons, ...

Greenhouses can be good for growing plants. But when applied to the whole planet, the greenhouse effect is bad news. We call the compounds in the atmosphere that trap Earth’s heat, such as carbon ...