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Sonar mapping of the Challenger Deep by the DSSV Pressure Drop employing a Kongsberg SIMRAD EM124 multibeam echosounder system (26 April – 4 May 2019). The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench, which itself is an unusually deep feature in the ocean floor.
Fish farming or pisciculture involves commercial breeding of fish, most often for food, in fish tanks or artificial enclosures such as fish ponds. It is a particular type of aquaculture , which is the controlled cultivation and harvesting of aquatic animals such as fish, crustaceans , molluscs and so on, in natural or pseudo-natural environments.
The female inflorescence, some way down the stem from the tassel, is first seen as a silk, a bundle of soft tubular hairs, one for the carpel in each female flower, which develops into a kernel (often called a seed. Botanically, as in all grasses, it is a fruit, fused with the seed coat to form a caryopsis [33]) when it is pollinated. [31]
Wave power is the capture of energy of wind waves to do useful work – for example, electricity generation, water desalination, or pumping water. A machine that exploits wave power is a wave energy converter (WEC). Waves are generated primarily by wind passing over the sea's surface and also by tidal forces, temperature variations, and other ...
Oxygen is a chemical element; it has symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Oxygen is the most abundant element in Earth's crust, and after hydrogen and helium, it ...
The devastation from this event, as well as from the 1939 California tropical storm, meant that Orange County was in need of new infrastructure, which was supported by the New Deal. This included the construction of numerous schools, city halls, post offices, parks, libraries, and fire stations, as well as the improvement of road infrastructure ...
In the book The Life and Death of Planet Earth, authors Peter D. Ward and Donald Brownlee state that some animal life may be able to survive in the oceans. Eventually, however, all multicellular life will die out. [81] The first sea animals to go extinct will be large fish, followed by small fish, and then finally, invertebrates. [78]
Caladrius (Roman) – white bird with healing powers. Chalkydri (Jewish) – heavenly creatures of the Sun. Chamrosh (Persian mythology) – body of a dog, head & wings of a bird. Cinnamon bird (Greek) – greek myth of an arabian bird that builds nests out of cinnamon. Devil Bird (Sri Lankan) – shrieks predicting death.