Could the universe be more than four-dimensional? Here is what scientists says

Physicists explore whether the universe hides extra dimensions. (Image: Canva)

Physicists wonder if our universe contains hidden extra dimensions. These dimensions could explain why gravity is so weak. They might be curled up so tightly we cannot see them. High-energy particles might reveal their presence indirectly in experiments. Finding them could reshape our understanding of physics completely.

Gravity is far weaker than the other fundamental forces. Electromagnetism, strong and weak nuclear forces dominate at small scales. Extra dimensions could allow gravity to “leak” outside our space. This could dilute its apparent strength in four dimensions. Solving this could answer the long-standing hierarchy problem in physics.

Extra dimensions may exist but remain very small or compact. We move through them unknowingly every moment of our lives. Theoretical models suggest their size could be subatomic or smaller. Some dimensions could be warped or curved in strange ways. Their configuration affects how gravity interacts with visible matter.

Gravity is thought to be carried by gravitons, hypothetical particles. If they move into extra dimensions, unusual massive gravitons may appear. High-energy colliders search for these particles to detect dimensions. So far, no evidence has been found in experiments worldwide. The results suggest hidden dimensions, if present, are very elusive.

Discovering extra dimensions could revolutionise fundamental physics entirely. It may unify gravity with other forces in one framework. It would support theories like string theory or quantum gravity. The search continues with particle experiments and theoretical modelling. Extra dimensions remain speculative but are scientifically compelling and intriguing.