• 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 (incl. astrophysics)
• Unsolved problems in software engineering

See also

• Open problem
• Encyclopedia of World Problems and Human Potential

External links

• [New York Times article on leading unsolved questions in science]

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