The principle of inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force. We are ...

Today's Challenger experiment is teaching us about Newton's First Law of Motion, the law of inertia. Materials Needed: 1 hard-boiled egg and 1 raw egg (same size and color) Test your eggs: Begin this ...

Dark matter is claimed to make up over 80% of all matter in the universe, but scientists have never seen it. We only assume it exists because, without it, the behavior of stars, planets and galaxies ...