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A phenomenon (pl.: phenomena), sometimes spelled phaenomenon, is an observable event. [1] The term came into its modern philosophical usage through Immanuel Kant , who contrasted it with the noumenon , which cannot be directly observed.
An aurora is a natural phenomenon. 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 ...
Cyclones. Extratropical cyclone. European windstorms; Australian East Coast Low "Medicane", Mediterranean tropical-like cyclones Polar cyclone; Tropical cyclone, also called a hurricane, typhoon, or just "cyclone"
Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole. Astronomy is one of the oldest natural sciences.
The effects of being a latchkey child differ with age. Loneliness, boredom and fear are most common for those younger than ten years of age. In the early teens, there is a greater susceptibility to peer pressure, potentially resulting in such behavior as alcohol abuse, drug abuse, sexual promiscuity and smoking.
A sunshower, or sun shower, is a meteorological phenomenon in which rain falls while the Sun is seen shining. [1] A sunshower is usually a result of winds associated with a rain storm sometimes miles away, blowing the airborne raindrops into an area where there are no clouds.
In a technique known as blue field entoptoscopy, the effect is used to estimate the blood flow in the retinal capillaries.The patient is alternatingly shown blue light and a computer generated picture of moving dots; by adjusting the speed and density of these dots, the patient tries to match the computer generated picture to the perceived entoptic dots.
Neoteny is an ancient, pervasive phenomenon. In urodeles, many extant taxa are neotenic, [45] and both morphological [46] and histological data suggest that the Middle Jurassic taxon Marmorerpeton was neotenic. [47]