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  • Thumbnail for Extinction (optical mineralogy)
    Minerals with two cleavages can have two extinction angles, with symmetrical extinction occurring when minerals have multiple angles that are the same....
    2 KB (242 words) - 04:08, 6 November 2023
  • Extinction is a neurological disorder that impairs the ability to perceive multiple stimuli of the same type simultaneously. Extinction is usually caused...
    33 KB (4,300 words) - 08:15, 28 February 2024
  • Thumbnail for Homo erectus
    exhibit no wear and were produced en masse, and concluded that these symmetrical, tear-drop shaped lithics functioned primarily as display tools so males...
    137 KB (15,920 words) - 18:14, 26 August 2024
  • Thumbnail for Megalodon
    Megalodon (category Piacenzian extinctions)
    regions may have reduced megalodon's primary food source. The shark's extinction coincides with a gigantism trend in baleen whales. Megalodon teeth have...
    135 KB (12,938 words) - 22:50, 26 August 2024
  • physics, the Bouguer–Lambert law is an empirical law which relates the extinction or attenuation of light to the properties of the material through which...
    32 KB (5,024 words) - 14:31, 25 April 2024
  • Thumbnail for High-voltage direct current
    known as the symmetrical monopole, the converters are earthed only via a high impedance and there is no earth current. The symmetrical monopole arrangement...
    78 KB (9,927 words) - 13:59, 19 August 2024
  • Thumbnail for Floral symmetry
    sepal and so on. It may or may not be possible to divide the flower into symmetrical halves by the same number of longitudinal planes passing through the...
    7 KB (753 words) - 15:11, 26 August 2024
  • Thumbnail for Ammonoidea
    Ammonoidea (category Maastrichtian extinctions)
    last species vanishing during or soon after the Cretaceous–Paleogene extinction event. They are often called ammonites, which is most frequently used...
    52 KB (5,802 words) - 15:21, 14 August 2024
  • coevolution. Arms races may be classified as either symmetrical or asymmetrical. In a symmetrical arms race, selection pressure acts on participants in...
    21 KB (2,523 words) - 12:32, 12 August 2024
  • Thumbnail for Basilosaurus
    Basilosaurus extinction coincides with the Eocene–Oligocene extinction event which happened 33.9 mya, which also resulted in the extinction of almost all...
    59 KB (5,801 words) - 18:36, 26 August 2024
  • Thumbnail for Luis Walter Alvarez
    Alvarez, he developed the Alvarez hypothesis which proposes that the extinction event that wiped out the non-avian dinosaurs was the result of an asteroid...
    53 KB (6,016 words) - 04:17, 31 July 2024
  • parity are forbidden. Thus transitions between two states that are each symmetric with respect to an inversion centre will not be observed. Transitions...
    6 KB (727 words) - 18:24, 27 October 2023
  • question in the theory of branching processes is the probability of ultimate extinction, where no individuals exist after some finite number of generations. Using...
    17 KB (2,418 words) - 21:28, 8 February 2024
  • Thumbnail for Maltese cross (optics)
    In polymer physics, Maltese Cross is a set of four symmetrically disposed sectors of high extinction that is displayed when a polymer is observed under...
    472 bytes (41 words) - 12:57, 27 May 2021
  • bright than when nearer the zenith. This attenuation, known as atmospheric extinction, is described quantitatively by the Beer–Lambert law. "Air mass" normally...
    35 KB (5,380 words) - 12:12, 15 August 2024
  • Thumbnail for DIAC
    voltage of less than 3 V. Their behavior is analogous to the striking and extinction voltages of a neon lamp, but it can be more repeatable and takes place...
    6 KB (761 words) - 11:55, 17 August 2024
  • Thumbnail for Evolution of fish
    Permian–Triassic extinction event; the conodonts became extinct at the Triassic–Jurassic extinction event. The Cretaceous–Paleogene extinction event, and the...
    47 KB (4,515 words) - 18:06, 7 July 2024
  • Thumbnail for Pinus resinosa
    texts, is however shared by several other pine species. The cones are symmetrical ovoid, 4–6 cm (1+1⁄2–2+1⁄4 in) long by 2.5 cm (1 in) broad, and purple...
    8 KB (899 words) - 16:05, 29 July 2024
  • Thumbnail for Cretoxyrhina
    Cretoxyrhina (category Campanian genus extinctions)
    Coniacian, but subsequently experienced a continuous decline until its extinction during the Campanian. One factor in this demise may have been increasing...
    95 KB (9,958 words) - 16:22, 28 June 2024
  • Thumbnail for Abalone
    columella, is on the middle of the inner wall of the shell. The gills are symmetrical and both well developed. These snails cling solidly with their broad...
    60 KB (5,480 words) - 06:35, 24 August 2024
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