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A nature style aquascape, suggesting mountains. A contrasting approach is the "nature aquarium" or Japanese style, introduced in the 1990s by Takashi Amano. [1] Amano's three-volume series, Nature Aquarium World, sparked a wave of interest in aquarium gardening, and he has been cited as having "set a new standard in aquarium management". [9]
The longships had two methods of propulsion: oars and sail. At sea, the sail enabled longships to travel faster than by oar and to cover long distances overseas with far less manual effort. Sails could be raised or lowered quickly. In a modern facsimile the mast can be lowered in 90 seconds.
Degrading concrete has been the focus of many studies and the most obvious sign is calcium-rich leachate seeping from a concrete structure. [5] [6] [7]Calthemite stalactites can form on concrete structures and "artificial caves" lined with concrete (e.g. mines and tunnels) significantly faster than those in limestone, marble or dolomite caves.
In fundamental respects it resembled the Scottish galley or bìrlinn, their mutual ancestor being the Viking longship. Both the Irish and Scottish versions were colloquially known as "longa fada" (longships). The Irish galley was commonly an eight or twelve-oared vessel and was used for both warfare and trade. It was notable for its speed when ...
The method of fastening the planking to the frames above the waterline is by iron rivets in the form of iron nails driven from outside and then turned over a cinch plate on the inside. [11] The lowest nine planks on each side of the keel up to the around the waterline are held to the frames by the archaic method of tying using withies. These ...
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Pit cave near Benagil in Lagoa, Portugal A caver rappelling into Mexico's enormous pit cave, Sotano de las Golondrinas Pit cave Haviareň, Little Carpathians. A pit cave, shaft cave or vertical cave—or often simply called a pit (in the US) and pothole or pot (in the UK); jama in Slavic languages scientific and colloquial vocabulary (borrowed since early research in the Western Balkan Dinaric ...
Carving of a horse, Hayonim Cave, Israel, 28000 BP. Upper Paleolithic sites of the Near East, such as the Hayonim Cave , a cave located in a limestone bluff about 250 meters above modern sea level, in the Upper Galilee , Israel , have wall carvings depicting symbolic shapes and animals, such as a running horse dated to the Levantine Aurignacian ...