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  2. James Bedford - Wikipedia

    en.wikipedia.org/wiki/James_Bedford

    In his first suspended animation stages, his body was stored at Edward Hope's Cryo-Care facility in Phoenix, Arizona, for two years, then in 1969 moved to the Galiso facility in California. Bedford's body was moved from Galiso in 1973 to Trans Time near Berkeley, California , until 1977, before being stored by his son for many years.

  3. Eratosthenes - Wikipedia

    en.wikipedia.org/wiki/Eratosthenes

    The son of Aglaos, Eratosthenes was born in 276 BC in Cyrene.Now part of modern-day Libya, Cyrene had been founded by Greeks centuries earlier and became the capital of Pentapolis (North Africa), a country of five cities: Cyrene, Arsinoe, Berenice, Ptolemias, and Apollonia.

  4. Ptolemy's table of chords - Wikipedia

    en.wikipedia.org/wiki/Ptolemy's_table_of_chords

    A chord of a circle is a line segment whose endpoints are on the circle. Ptolemy used a circle whose diameter is 120 parts. Ptolemy used a circle whose diameter is 120 parts. He tabulated the length of a chord whose endpoints are separated by an arc of n degrees, for n ranging from ⁠ 1 / 2 ⁠ to 180 by increments of ⁠ 1 / 2 ⁠ .

  5. History of trigonometry - Wikipedia

    en.wikipedia.org/wiki/History_of_trigonometry

    The chord of an angle subtends the arc of the angle. Ancient Greek and Hellenistic mathematicians made use of the chord. Given a circle and an arc on the circle, the chord is the line that subtends the arc. A chord's perpendicular bisector passes through the center of the circle and bisects the angle.

  6. Suspended chord - Wikipedia

    en.wikipedia.org/wiki/Suspended_chord

    A suspended chord (or sus chord) is a musical chord in which the (major or minor) third is omitted and replaced with a perfect fourth or a major second. [1] The lack of a minor or a major third in the chord creates an open sound, while the dissonance between the fourth and fifth or second and root creates tension.

  7. Chord (geometry) - Wikipedia

    en.wikipedia.org/wiki/Chord_(geometry)

    Equal chords are subtended by equal angles from the center of the circle. A chord that passes through the center of a circle is called a diameter and is the longest chord of that specific circle. If the line extensions (secant lines) of chords AB and CD intersect at a point P, then their lengths satisfy AP·PB = CP·PD (power of a point theorem).

  8. Circle - Wikipedia

    en.wikipedia.org/wiki/Circle

    The angle between a chord and the tangent at one of its endpoints is equal to one half the angle subtended at the centre of the circle, on the opposite side of the chord (tangent chord angle). If the angle subtended by the chord at the centre is 90 ° , then ℓ = r √2 , where ℓ is the length of the chord, and r is the radius of the circle.

  9. Robert Ettinger - Wikipedia

    en.wikipedia.org/wiki/Robert_Ettinger

    [citation needed] While Ettinger was the first, most articulate, and most scientifically credible person to argue the idea of cryonics, [citation needed] he was not the only one. In 1962, Evan Cooper had authored a manuscript entitled "Immortality: Physically, Scientifically, Now" [ 13 ] under the pseudonym Nathan Duhring. [ 14 ]