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  2. No-hair theorem - Wikipedia

    en.wikipedia.org/wiki/No-hair_theorem

    The no-hair theorem (which is a hypothesis) states that all stationary black hole solutions of the Einstein–Maxwell equations of gravitation and electromagnetism in general relativity can be completely characterized by only three independent externally observable classical parameters: mass, angular momentum, and electric charge.

  3. Human hair growth - Wikipedia

    en.wikipedia.org/wiki/Human_hair_growth

    It is commonly stated that hair grows about 1 cm per month on average; however reality is more complex, since not all hair grows at once. Scalp hair was reported to grow between 0.6 cm and 3.36 cm per month. The growth rate of scalp hair somewhat depends on age (hair tends to grow more slowly with age), sex, and ethnicity. [3]

  4. Pili annulati - Wikipedia

    en.wikipedia.org/wiki/Pili_annulati

    Pili annulati (also known as "ringed hair") [1] is a genetic trait in which the hair seems 'banded' by alternating segments of light and dark color when seen in reflected light. [1] [2]: 767 [3]: 640 [4] Pili annulati manifests during infancy or at birth. The clinical manifestation varies. Usually, the hair appears shiny and banded.

  5. Hair - Wikipedia

    en.wikipedia.org/wiki/Hair

    Hair is a protein filament that grows from follicles found in the dermis.Hair is one of the defining characteristics of mammals.The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair.

  6. Stephen Hawking's famous prediction about black holes was ...

    www.aol.com/article/2016/08/15/stephen-hawking-s...

    Acoustic black hole. To test this prediction, Steinhauer created an analogue black hole using extremely cold atoms trapped in a laser beam. When he applied a second laser beam, it made a sort of ...

  7. Trepanning - Wikipedia

    en.wikipedia.org/wiki/Trepanning

    Detail from The Extraction of the Stone of Madness, a painting by Hieronymus Bosch depicting trepanation (c. 1488–1516). Trepanning, also known as trepanation, trephination, trephining or making a burr hole (the verb trepan derives from Old French from Medieval Latin trepanum from Greek trúpanon, literally "borer, auger"), [1] [2] is a surgical intervention in which a hole is drilled or ...

  8. Hair follicle - Wikipedia

    en.wikipedia.org/wiki/Hair_follicle

    The hair follicle is an organ found in mammalian skin. [1] It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions.. The hair follicle regulates hair growth via a complex interaction between hormones, neuropeptides, and immune cells

  9. Black hole - Wikipedia

    en.wikipedia.org/wiki/Black_hole

    The no-hair theorem postulates that, once it achieves a stable condition after formation, a black hole has only three independent physical properties: mass, electric charge, and angular momentum; the black hole is otherwise featureless. If the conjecture is true, any two black holes that share the same values for these properties, or parameters ...