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List of unsolved problems may refer to several notable conjectures or open problems in various academic fields: Natural sciences, engineering and medicine
Wicked problem – Problem that is difficult or impossible to solve; World Community Grid – BOINC based volunteer computing project to aid scientific research; WorldRiskReport – Annual cooperation report on global disaster risks; World-systems theory – Approach emphasizing the world-system as the primary unit of social analysis
Homochirality is an obvious characteristic of life on Earth, yet extraterrestrial samples contain largely racemic compounds. [7] It is not known whether homochirality existed before life, whether the building blocks of life must have this particular chirality, or whether life must be homochiral at all. [8] [9] What do all the unknown proteins do?
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Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.
Well, put down that duct tape and step away from the DIY disasters, because we've got a treasure trove of tiny triumphs that'll make you feel like you've finally cracked the code of everyday life!
The following articles contain lists of problems: List of philosophical problems; List of undecidable problems; Lists of unsolved problems; List of NP-complete problems; List of PSPACE-complete problems
Lists of unsolved problems (16 P) Year of death unknown (2 C, 8,804 P) B. Bridge disasters of unknown cause (4 P) C. Undeciphered historical codes and ciphers (1 C, 19 P)