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Petrichor
Petrichor ( ) is the earthy scent produced when rain falls on dry soil. The word was coined by Isabel Joy Bear and Richard Grenfell Thomas , the ethereal fluid that is the blood of the gods in Greek mythology. Origins A brief note on the phenomenon by (1833–1908) appeared in ''The Chemical News'' on 17 April 1891 and was re-published in its entirety, a month later, in ''The Scientific American'', in which he wrote, "This subject, with which I was occupied more than twenty-five years ago, appears from a paragraph in the last number of the ''Chemical News'' to have recently attracted the attention of Professor Berthelot and onsieur G.Andre." Phipson was referring to a short paper read by Berthelot and André at the meeting of the French Académie des Sciences on 23 April 1891, and printed in Volume 112 (1891) of ''Comptes Rendus'', entitled "Sur l'odeur propre de la terre" ("On the earth's own smell"). Phipson continues, "I find, on referring to my old notes, which are da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water And Soil Splashed By The Impact Of A Single Raindrop
Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent). It is vital for all known forms of life, despite not providing food energy or organic micronutrients. Its chemical formula, , indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. In liquid form, is also called "water" at standard temperature and pressure. Because Earth's environment is relatively close to water's triple point, water exists on Earth as a solid, a liquid, and a gas. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
