There could be a variety of reasons why a problem remains unsolved. It could be due to a lack of information or data, the complexity of the problem, or the limitations of current technology.
It's possible that others have tried to solve the problem in the past, but were unsuccessful. This is common in the scientific community where many experiments and studies may not yield the desired results.
The difficulty of a problem can vary, but it often involves a combination of factors such as the complexity of the subject matter, the need for specialized knowledge or equipment, and the limitations of current understanding or technology.
There is no one-size-fits-all approach to solving a problem. It often requires a combination of critical thinking, creativity, and experimentation. It may also involve consulting with other experts in the field or exploring new perspectives.
It's difficult to predict when a problem may be solved, as it often depends on various factors such as funding, collaboration, and breakthroughs in technology. However, continued efforts and advancements in science and technology make it possible for previously unsolvable problems to be solved in the future.