List of Unsolved Problems
If you have nothing better to do, you might want to try tackling some of the following unsolved problems in various subjects:
* Unsolved problems in biology
* Unsolved problems in chemistry
* Unsolved problems in cognitive science
* Unsolved problems in computer science
* Unsolved problems in economics
* Unsolved problems in Egyptology
* Unsolved problems in linguistics
* Unsolved problems in mathematics
* Unsolved problems in medicine
* Unsolved problems in neuroscience
* Unsolved problems in philosophy
* Unsolved problems in physics
* Unsolved problems in Sinology
