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Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown

New and Recently-changed pages

These are recent changes to Wikenigma
Newest at the top. Click links to view . . .


New pages

  • Post-concussion syndromeplugin-autotooltip__plain plugin-autotooltip_bigPost-concussion syndrome

    Post-concussion syndrome (PCS) refers to a range of reported symptoms which persist - sometimes for months or even years - after a brain concussion event.

    PCS is estimated to affect 15-30% of people who have had concussion injuries.
  • Insect population declineplugin-autotooltip__plain plugin-autotooltip_bigInsect population decline

    Various scientific studies have shown that the global terrestrial* insect population is in sharp decline.

    The declines are primarily found in 'developed' nations. Estimates for the rate of decline vary wildly. One review study, which compiled…
  • FFT boundsplugin-autotooltip__plain plugin-autotooltip_bigFFT bounds

    A Fast Fourier Transform (FFT) is well established computational / mathematical method for calculating the Discrete Fourier Transform (DFT) of a dataset. That's to say, which simple harmonic frequencies, in which ratios, can be combined to approximate a com…
  • Post-Treatment Lyme Disease Syndrome - PTLDSplugin-autotooltip__plain plugin-autotooltip_bigPost-Treatment Lyme Disease Syndrome - PTLDS

    Lyme Diseases is a severe and potentially dangerous condition due to bacterial infection following bites from ticks in the genus Ixodes.

    The infection can be treated with a course of antibiotics, but in 10 - 20% of patients
  • Solar 'dynamo'plugin-autotooltip__plain plugin-autotooltip_bigSolar 'dynamo'

    "Explaining the origin of the Sun’s magnetic field is the fundamental problem of solar magnetohydrodynamics (MHD). This dynamic magnetic field is responsible for all solar magnetic phenomena, such as solar flares, coronal mass ejections and the solar wi…
  • Brief Psychotic Disorder (BPD)plugin-autotooltip__plain plugin-autotooltip_bigBrief Psychotic Disorder (BPD)

    "Brief psychotic disorder (BPD) according to DSM-5 is the sudden onset of psychotic behavior that lasts less than 1 month followed by complete remission with possible future relapses.

    Source : Stephen A, Lui F. Brief Psychotic Disorder.…
  • Hexazineplugin-autotooltip__plain plugin-autotooltip_bigHexazine

    Hexazine is a predicted chemical compound with the formula N6.

    Hexazine would have molecules of six Nitrogen atoms, arranged in a ring structure (analogous to benzene).

    It has never been observed, and its properties are unknown. Some computational analyses s…
  • Self avoiding walksplugin-autotooltip__plain plugin-autotooltip_bigSelf avoiding walks

    In mathematics, a Self-Avoiding Walk (SAW) is a sequence of moves on a lattice (a lattice path) that does not visit the same point more than once. (see Wikipedia )

    The question of how many possible n-step SAWs are available on any given lattice is …
  • 'Schooner' etymologyplugin-autotooltip__plain plugin-autotooltip_big'Schooner' etymology

    The origins of the word 'Schooner' meaning a tall glass for beer etc is unknown. The word dates back at least as far as 1879.

    The other meaning of 'Schooner' - a two masted fast sailing boat, is also obscure.

    "[...] perhaps from a New England v…
  • Empathogenic drugsplugin-autotooltip__plain plugin-autotooltip_bigEmpathogenic drugs

    Empathogenic - a.k.a. Entactogenic - drugs are a wide-ranging group of compounds (e.g. MDMA) which produce experiences described as emotional communion, empathy or sympathy for others, oneness, relatedness, and emotional openness.
  • Costochondritisplugin-autotooltip__plain plugin-autotooltip_bigCostochondritis

    Costochondritis is a benign, though painful, inflammation of the chest-wall. It's estimated to account for more than a quarter of the chest-pain cases in adults. ( ref. )

    The cause is unknown. Some instances are due to over-exertion or trauma, and bact…
  • Astatineplugin-autotooltip__plain plugin-autotooltip_bigAstatine

    Astatine is the rarest naturally-occurring chemical element. Its symbol is At and it has the atomic number 85.

    Its highly radioactive, and only occurs as a decay product of other radioactive compounds. Because of its short half-life (the most stable isotope…
  • Betaxololplugin-autotooltip__plain plugin-autotooltip_bigBetaxolol

    Betaxolol - currently sold under brand names Betoptic, Betoptic S, Lokren, Kerlone and others - is a prescription drug used to treat glaucoma and ocular hypertension. It was patented in 1975 and was first licenced for medical use over forty years ago.
  • Metaxaloneplugin-autotooltip__plain plugin-autotooltip_bigMetaxalone

    Metaxalone ( 5-[(3,5-dimethylphenoxy) methyl]-2-oxazolidinone ) is a prescription-only drug used to treat acute, painful musculoskeletal conditions, such as muscles in spasm, strains, sprains etc.

    It has been sold in the US since 1962 under the brand name
  • Castanetsplugin-autotooltip__plain plugin-autotooltip_bigCastanets

    Note: This article is currently in the Proposed Content section.

    The origin of the hand-held percussion instrument known as Castanets is unknown.

    They were in use in the 1700s, but are probably much older. Possibly related to the Roman instrument called

Recently edited pages

  • Post-concussion syndromeplugin-autotooltip__plain plugin-autotooltip_bigPost-concussion syndrome

    Post-concussion syndrome (PCS) refers to a range of reported symptoms which persist - sometimes for months or even years - after a brain concussion event.

    PCS is estimated to affect 15-30% of people who have had concussion injuries.
  • Prime Numbersplugin-autotooltip__plain plugin-autotooltip_bigPrime Numbers

    Since all other whole numbers (except 0) can be produced by multiplying together primes – they must be considered fundamental.

    (1), 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 &etc

    There are an infinite number of primes - as proved by Euclid around 300B.C. (…
  • Insect population declineplugin-autotooltip__plain plugin-autotooltip_bigInsect population decline

    Various scientific studies have shown that the global terrestrial* insect population is in sharp decline.

    The declines are primarily found in 'developed' nations. Estimates for the rate of decline vary wildly. One review study, which compiled…
  • Bee Colony Collapse Disorder [ CCD ]plugin-autotooltip__plain plugin-autotooltip_bigBee Colony Collapse Disorder [ CCD ]

    "“Colony collapse disorder (CCD) is the phenomenon that occurs when the majority of worker bees in a colony disappear and leave behind a queen, plenty of food and a few nurse bees to care for the remaining immature bees and the que…
  • Asthmaplugin-autotooltip__plain plugin-autotooltip_bigAsthma

    Asthma is a common, (and currently incurable) long term inflammatory disease of the airways of the lungs, characterized by variable and recurring symptoms such as reversible airflow obstruction, and bronchospasm. Episodes of asthma frequently feature wheezing, c…
  • FFT boundsplugin-autotooltip__plain plugin-autotooltip_bigFFT bounds

    A Fast Fourier Transform (FFT) is well established computational / mathematical method for calculating the Discrete Fourier Transform (DFT) of a dataset. That's to say, which simple harmonic frequencies, in which ratios, can be combined to approximate a com…
  • Post-Treatment Lyme Disease Syndrome - PTLDSplugin-autotooltip__plain plugin-autotooltip_bigPost-Treatment Lyme Disease Syndrome - PTLDS

    Lyme Diseases is a severe and potentially dangerous condition due to bacterial infection following bites from ticks in the genus Ixodes.

    The infection can be treated with a course of antibiotics, but in 10 - 20% of patients
  • Solar 'dynamo'plugin-autotooltip__plain plugin-autotooltip_bigSolar 'dynamo'

    "Explaining the origin of the Sun’s magnetic field is the fundamental problem of solar magnetohydrodynamics (MHD). This dynamic magnetic field is responsible for all solar magnetic phenomena, such as solar flares, coronal mass ejections and the solar wi…
  • Solar Cycleplugin-autotooltip__plain plugin-autotooltip_bigSolar Cycle

    Scientists started to make records of sunspot activity in the mid 18th century, and by the mid 19th it was discovered that the number of spots (which are lower-temperature entry-and-exit points for magnetic flux lines penetrating the Sun's surface) varies o…
  • Hexazineplugin-autotooltip__plain plugin-autotooltip_bigHexazine

    Hexazine is a predicted chemical compound with the formula N6.

    Hexazine would have molecules of six Nitrogen atoms, arranged in a ring structure (analogous to benzene).

    It has never been observed, and its properties are unknown. Some computational analyses s…
  • Self avoiding walksplugin-autotooltip__plain plugin-autotooltip_bigSelf avoiding walks

    In mathematics, a Self-Avoiding Walk (SAW) is a sequence of moves on a lattice (a lattice path) that does not visit the same point more than once. (see Wikipedia )

    The question of how many possible n-step SAWs are available on any given lattice is …
  • 'Schooner' etymologyplugin-autotooltip__plain plugin-autotooltip_big'Schooner' etymology

    The origins of the word 'Schooner' meaning a tall glass for beer etc is unknown. The word dates back at least as far as 1879.

    The other meaning of 'Schooner' - a two masted fast sailing boat, is also obscure.

    "[...] perhaps from a New England v…
  • Deep-diving animalsplugin-autotooltip__plain plugin-autotooltip_bigDeep-diving animals

    Human divers need to resurface very slowly to avoid dangerous 'gas embolisms' which lead to decompression sickness (a.k.a. The Bends).

    Deep-diving animals - e.g. whales, dolphins, turtles (and some birds) etc do not suffer the same problems (or ve…
  • Brief Psychotic Disorder (BPD)plugin-autotooltip__plain plugin-autotooltip_bigBrief Psychotic Disorder (BPD)

    "Brief psychotic disorder (BPD) according to DSM-5 is the sudden onset of psychotic behavior that lasts less than 1 month followed by complete remission with possible future relapses.

    Source : Stephen A, Lui F. Brief Psychotic Disorder.…
  • Schizophreniaplugin-autotooltip__plain plugin-autotooltip_bigSchizophrenia

    "“Schizophrenia is a mental disorder characterized by abnormal social behavior and failure to understand what is real. Common symptoms include false beliefs, unclear or confused thinking, auditory and visual hallucinations, reduced social engagement and …

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