Science
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Science mysteries
Unsolved problems in science
A list of unsolved problems may refer to several conjectures or open problems in various fields:
Unsolved problems in science - Wikipedia
AI-complete
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List of unsolved problems in biology
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Unsolved problems in chemistry
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Unsolved problems in computer science
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Unsolved problems in economics
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Unsolved problems in linguistics
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Unsolved problems in mathematics
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Ailments of unknown etiology
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Unsolved problems in neuroscience
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Unsolved problems in philosophy
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Unsolved problems in physics
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Unsolved problems in statistics
5 Unanswered Questions That Will Keep Physicists Awake at Night
Physics is all about probing the most fundamental mysteries in nature, so it’s no surprise that physicists have some very basic questions about the universe on ...
The Biggest Unsolved Mysteries in Physics | Open Questions | LiveScience
The more we learn about the universe, the more questions seem to arise. Here are our picks for the biggest open questions remaining in the field of physics.
AI-complete
In the field of artificial intelligence, the most difficult problems are informally known as AI-complete or AI-hard, implying that the difficulty of these computational problems is equivalent to that ...
List of unsolved problems in biology
This article lists currently unsolved problems in biology.
Unsolved problems in chemistry
Unsolved problems in chemistry tend to be questions of the kind "Can we make X chemical compound?", "Can we analyse it?", "Can we purify it?" and are commonly solved rather quickly, but may just as we...
Unsolved problems in computer science
This article is a list of unsolved problems in computer science. A problem in computer science is considered unsolved when an expert in the field (i.e, a computer scientist) considers it unsolved or w...
Unsolved problems in economics
This is a list of some of the major unsolved problems, puzzles, or questions in neoclassical economics. Some of these are theoretical in origin and some of them concern the inability of orthodox econo...
Unsolved problems in linguistics
This article discusses currently unsolved problems in linguistics.Some of the issues below are commonly recognized as unsolved problems; i.e., it is generally agreed that no solution is known. Others...
Unsolved problems in mathematics
This article reiterates the Millennium Prize list of unsolved problems in mathematics as of October 2014, and lists further unsolved problems in algebra, additive and algebraic number theories, analys...
Ailments of unknown etiology
Unsolved problems in neuroscience
There are yet unsolved problems in neuroscience, although some of these problems have evidence supporting a hypothesized solution, and the field is rapidly evolving. These problems include:
Unsolved problems in philosophy
This is a list of some of the major unsolved problems in philosophy. Clearly, unsolved philosophical problems exist in the lay sense (e.g. "What is the meaning of life?", "Where did we come from?", "W...
Unsolved problems in physics
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 experim...
Unsolved problems in physics - Wikipedia
Unsolved problems in statistics
There are many longstanding unsolved problems in mathematics for which a solution has still not yet been found. The unsolved problems in statistics are generally of a different flavor; according to Jo...
Artificial intelligence
Artificial intelligence (AI) is the intelligence exhibited by machines or software. It is an academic field of study which studies the goal of creating intelligence. Major AI researchers and textbooks...
Artificial intelligence - Wikipedia
Cambrian explosion
The Cambrian explosion, or less commonly Cambrian radiation, was the relatively short evolutionary event, beginning around 542 million years ago in the Cambrian Period, during which most major animal ...
Cambrian explosion - Wikipedia
Köthe conjecture
In mathematics, the Köthe conjecture is a problem in ring theory, open as of 2010. It is formulated in various ways. Suppose that R is a ring. One way to state the conjecture is that if R has no nil i...
Köthe conjecture - Wikipedia
Synovial osteochondromatosis
Synovial osteochondromatosis (SOC) (synonyms include synovial chondromatosis, primary synovial chondromatosis, synovial chondrometaplasia) is a rare disease that creates a benign change or proliferati...
Synovial osteochondromatosis - Wikipedia
POPLmark challenge
In programming language theory, the POPLmark challenge (formerly Mechanized Metatheory for the Masses!) is a set of benchmarks designed to evaluate the state of mechanization in the metatheory of prog...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occ...
Gamma-ray burst - Wikipedia
Holeum
Holeums are hypothetical stable, quantized gravitational bound states of primordial or micro black holes.
Holeums were proposed by L.K. Chavda and Abhijit Chavda in 2002. They have all the propert...
Chinese hypothesis
In number theory, the Chinese hypothesis is a disproven conjecture stating that an integer n is prime if and only if it satisfies the condition that 2−2 is divisible by n. In other words, that i...
NP = co-NP problem
In computational complexity theory, co-NP is a complexity class. A decision problem is a member of co-NP if and only if its complement is in the complexity class NP. In simple terms, co-NP is the c...
Henoch–Schönlein purpura
Henoch–Schönlein purpura - Wikipedia
P = PSPACE problem
In computational complexity theory, PSPACE is the set of all decision problems that can be solved by a Turing machine using a polynomial amount of space.
If we denote by SPACE(t(n)), the set of al...
Charles Darwin's health
For much of his adult life, Charles Darwin's health was repeatedly compromised by an uncommon combination of symptoms, leaving him severely debilitated for long periods of time. However, in some ways ...
Generalized star height problem
The generalized star-height problem in formal language theory is the open question whether all regular languages can be expressed using generalized regular expressions with a limited nesting depth of ...
Baryon asymmetry
The baryon asymmetry problem in physics refers to the fact that there is an imbalance in baryonic matter and antibaryonic matter in the observable universe. Neither the standard model of particle phys...
Nanobacterium
Nanobacterium (NAH-no-bak-TEER-ee-əm, pl. nanobacteria NAH-no-bak-TEER-ee-uh) is the unit or member name of a proposed class of living organisms, specifically cell-walled microorganisms with a size mu...
Chronic fatigue syndrome treatment
Treatment of chronic fatigue syndrome (CFS) is variable and uncertain, and the condition is primarily managed rather than cured. Only two treatments, cognitive behavioral therapy and graded exercise ...