Forbes contributors publish independent expert analyses and insights. I write about physics, science, academia, and pop culture. This helps, sort of, but as more numbers get thrown around, it can get ...

Any football fan knows that one of the most exciting plays on the field is the sack, which occurs when the quarterback (or whoever is acting as the passer) is tackled behind the line of scrimmage ...

If you push an ordinary ball, it moves away from your hand. No surprise there. But if you pushed a ball with negative mass, it would actually accelerate backwards, moving towards you instead. It might ...