Explore 25 Unsolved Mysteries That Haunt Modern Science. From dark matter to consciousness, these profound puzzles challenge ...

One question in computer science has stood above the rest for decades, resisting every attempt to settle it despite its enormous implications. At the center of the mystery is a deceptively simple idea ...

(PhysOrg.com) -- Just over a century ago, one of the world’s leading mathematicians posed this question to a number of his colleagues: What are the most important unsolved questions in mathematics?