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A natural phenomenon is an observable event which is not man-made. Examples include: sunrise, weather, fog, thunder, tornadoes; biological processes, decomposition, germination; physical processes, wave propagation, erosion; tidal flow, and natural disasters such as electromagnetic pulses, volcanic eruptions, hurricanes and earthquakes. [1] [2]
Foxfire in the fungus Panellus stipticus Blue ocean glow caused by myriad tiny organisms, such as Noctiluca. Noctiluca scintillans, a bioluminescent dinoflagellate. Bioluminescence is the production of light by living organisms. This list of bioluminescent organisms is organized by the environment, covering terrestrial, marine, and microorganisms.
The farther away an object is, the more blue it often appears to the eye. For example, mountains in the distance often appear blue. This is the effect of atmospheric perspective; the farther an object is away from the viewer, the less contrast there is between the object and its background colour, which is usually blue. In a painting where ...
Patterns in nature are visible regularities of form found in the natural world. These patterns recur in different contexts and can sometimes be modelled mathematically. Natural patterns include symmetries, trees, spirals, meanders, waves, foams, tessellations, cracks and stripes. [1] Early Greek philosophers studied pattern, with Plato ...
Cosgarach Mhor, the Great Triumphant One, sword of Oscar. Crocea Mors[ fr ], formerly the sword of Julius Caesar, captured by Nennius according to the legends presented by Geoffrey of Monmouth. Cruadh-Chosgarach, the Hard Destroying One, sword of Caílte mac Rónáin. Cruaidín Catutchenn, the sword of Cú Chulainn.
Enbarr ( Irish ) – Manann's horse, capable of traversing land and sea. Hippocampus ( Greek ) – Horse with a fish tail. Ichthyocentaurs ( Greek ) – Upper body of a man, the lower front of a horse, tail of a fish. Kelpie ( Scottish ) – Water horse. Morvarc'h ( Breton ) – Legendary horse that could gallop on the waves.
Another object might selectively transmit blue light while absorbing all other frequencies of visible light. The manner in which visible light interacts with an object is dependent upon the frequency of the light, the nature of the atoms in the object, and often, the nature of the electrons in the atoms of the object.
Berlin and Kay identified eleven possible basic color categories: white, black, red, green, yellow, blue, brown, purple, pink, orange, and gray. To be considered a basic color category, the term for the color in each language had to meet certain criteria: It is monolexemic (for example, red, not red-yellow or yellow-red.)