For decades, scientists and thinkers have tried to explain the meaning of existence, using physics, biology, and the scale of ...

The Big Ideas: What Is Reality? Effective theories in physics can help us measure and examine reality, despite the many things we do not yet know. By Lisa Randall Dr. Randall is a physicist. This ...

Physics is the study of the underlying laws and mechanisms explaining how the universe works. Most of what we do in daily life is based on a principle or law of physics—dealing with forces, motion, ...