Gen-Unsolved-Mysteries - For mysterious disappearances or appearances, unsolved murders, questionable incarcerations, and other mysterious or unsolved events in an ancestor's life.
Unsolved Mathematics Problems - Compiled by Steven Finch. Descriptions of some unsolved problems and numerous links to other collections.
Unsolved Mysteries - Official site. Real mysteries and crimes are reenacted and detailed in order to generate tips for solving them. Includes archive of cases investigated.
Reward-Offer.com - Provides an international medium for the publication of rewards offered for public assistance for unsolved crimes, lost or stolen property, missing persons.
List of unsolved problems - A list of unsolved problems may refer to several conjectures or open problems in various fields. The problems are listed below:
Unsolved problems in philosophy - This article deals mainly with unsolved problems in analytic philosophy. For other schools of philosophy, this concept is not well defined.
Unsolved murders in the United Kingdom - This is a list of unsolved murders in the UK. Victims believed to have been murdered by the same perpetrator(s) are grouped together.
Unsolved problems in mathematics - This article lists some unsolved problems in mathematics. See individual articles for details and sources.