An overview of some unresolved questions in modern physics, including challenges in understanding gravity, quantum mechanics, and the structure of the universe.

Over the short span of just 300 years, since the invention of modern physics, we have gained a deeper understanding of how our universe works on both small and large scales. Yet, physics is still very ...

Note: Articles may be assigned to more than one subject area, as a result the sum of the subject research outputs may not equal the overall research outputs. Actionable insights into research ...