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| 질의: reptile | 결과: 1830번째/2581 | |
Loch Ness Monster - Wiki
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Loch Ness Monster
From Wikipedia, the free encyclopedia
[Photo] Photo of the Loch Ness monster. The "Surgeon's photo" (1934), later revealed as a hoax.
The Loch Ness Monster is a cryptid, claimed to inhabit Scotland's Loch Ness, the most voluminous freshwater lake in Great Britain.
Along with Bigfoot and the Yeti, the Loch Ness Monster is one of the best-known mysteries of cryptozoology. Belief in the legend persists around the world. Local people, and later many around the world, have affectionately referred to the animal by the diminutive of Nessie (Scottish Gaelic: "Niseag").
Description of Nessie
Many explanations have been postulated over the years to describe what kind of animal the Loch Ness Monster might be. These fall into three categories: (1) misidentification of known animals; (2) unknown species; (3) paranormal creatures.
Known Animals
It has been suggested that at least some of the sightings might be explained by large pike (Esox lucius), sturgeon, or dolphins. Land animals dogs, deer, and otters have been seen in the water: even a bird viewed through binoculars could be mistaken for a head and neck.
Elephant
A theory presented by Neil Clark, the curator of paleontology at the Hunterian Museum in Glasgow has suggested that Nessie could merely be a swimming elephant, as there was a travelling circus passing through the area during the heyday of the sightings. Bertram Mills used to take his circus to Inverness, Scotland. When they passed Loch Ness the circus would stop to allow the animals to rest and bath. When the elephants were allowed to swim in the Loch, "only the trunk and two humps could be seen: the first hump being the top of the head and the second being the back of the animal." When the Loch Ness Monster story broke, Bertram Mills was confident enough that the creature did not exist to offer a ??20,000 reward, ??1 million in today’s money, to anyone who could catch the monster. No one ever collected on the reward, and Mills gained much publicity.
Unknown Species
Plesiosaur
The most common eyewitness description of Nessie, is that of a plesiosaur, a long-necked aquatic reptile that became extinct during the Cretaceous-Tertiary extinction event. Supporters of the plesiosaur theory cite the survival of a fish called the coelacanth, which supposedly went extinct along with the plesiosaur but was rediscovered off the coast of South Africa in 1938.
On the other hand, mainstream science does offer plausible reasons why such an animal could not exist in Loch Ness. Apart from its apparent extinction, the plesiosaur was probably a cold-blooded reptile requiring warm tropical waters, while the average temperature of Loch Ness is only about 5.5°C (42°F). Even if the plesiosaurs were warm-blooded, they would require a food supply beyond that of Loch Ness to maintain the level of activity necessary for warm-blooded animals.
Moreover, there is no substantive evidence in the bone structure of fossilised plesiosaurs that indicate sonar capability (similar to that possessed by dolphins and whales). Such a system would be necessary in the loch, as visibility is limited to less than 15 feet due to a high peat concentration in the loch. Consequently, sunlight does not deeply penetrate the water, limiting the amount of photosynthetic algae, thereby reducing the number of plankton and fish in the food chain. Fossil evidence indicates plesiosaurs were sight hunters; it is unlikely that the loch's peat-stained water would allow such animals to hunt the limited food supply at sufficient levels.
In October 2006, Leslie No?? of the Sedgwick Museum in Cambridge pointed out that, "The osteology of the neck makes it absolutely certain that the plesiosaur could not lift its head up swan-like out of the water", precluding the possibility that Nessie is a plesiosaur.
Long-necked seal
Peter Costello posed the theory that Nessie and other reputed lake monsters were actually an unknown species of long-necked seal. This theory is supported by several sightings of the monster on land, during which the creature supposedly waddled into the loch upon being startled, in the manner of seals. However, all known species of pinnipeds are usually visible on land during daylight hours to sunbathe, something that Nessie was never known to do.
Eel
Some have theorized that "Nessie" may be a giant eel. They believe that an eel might have grossly enlarged in order to eat the bigger fish, or that a larger eel species inhabits the loch. But eels are not known to protrude swanlike from the water as described in some sightings.
Invertebrates
Frank Holiday proposed that Nessie and other lake monsters such as Morag could be explained by a giant invertebrate, and cited the extinct Tullimonstrum as an example of the shape. He says this provides an explanation for land sightings and for the variable back shape, and relates it to the medieval description of dragons as "worms".
Paranormal
Kelpie
According to the Swedish naturalist and author Bengt Sj??gren (1980), present day beliefs in loch monsters such as Nessie are associated with the old legends of kelpies. He claims that the accounts of loch monsters have changed over the ages, originally describing a horse appearance, they claimed that the "kelpie" would come out of the lake and turn into a horse. When a tired traveller would get on the back of the kelpie, it would gallop into the loch and devour its prey. This myth successfully kept children away from the loch, as was its purpose. Sj??gren concludes that the kelpie legends have developed into more plausible descriptions of lake monsters, reflecting awareness of plesiosaurs. In other words, the kelpie of folklore has been transformed into a more "realistic" and "contemporary" notion of the creature. Believers counter that long-dead witnesses could only compare the creature to that which they were familiar -- and were not familiar with plesiosaurs.
Holiday has also ascribed the difficulty of obtaining good evidence as due to something other than chance: either a psychological reluctance to accept the unwelcome truth (and therefore unconscious failures to operate equipment etc.) or some actual paranormal effect, and possible connection with UFOs.
Other explanations
Trees
In a 1982 series of articles for New Scientist, Dr Maurice Burton proposed that sightings of Nessie and similar creatures could actually be fermenting logs of Scots pine rising to the surface of the loch's cold waters. Initially, a rotting log could not release gases caused by decay, because of high levels of resin sealing in the gas. Eventually, the gas pressure would rupture a resin seal at one end of the log, propelling it through the water -- and sometimes to the surface. Burton claimed that the shape of tree logs with their attendant branch stumps closely resemble various descriptions of the monster.
Four Scottish lochs are very deep, including Morar, Ness and Lomond. But not all lochs have monster legends; the lochs with pinewoods on their shores have the legends, but Loch Lomond -- the one with no pinewoods -- does not. Gaseous emissions and surfactants resulting from the decay of the logs can cause the foamy wake reported in some sightings. Indeed, beached pine logs showing evidence of deep-water fermentation have been found. On the other hand, there are believers who assert that some lakes do have reports of monsters, despite an absence of pinewoods. (A notable example would be the Irish lough monsters).
Seiches and Wakes
Loch Ness, because of its long, straight shape, is subject to some unusual occurrences affecting its surface. A seiche is a large, regular oscillation of a lake, caused by a water reverting to its natural level after being blown to one end of the lake. The impetus from this reversion continues to the lake's windward end and then reverts back. In Loch Ness, the process occurs every 31.5 minutes.
Boat wakes can also produce strange effects in the loch. As a wake spreads and divides from a boat passing the centre of the loch, it hits both sides almost simultaneously and deflects back to meet again in the middle. The movements interact to produce standing waves that are much larger than the original wake, and can have a humped appearance. By the time this occurs, the boat has passed and the unusual waves are all that can be seen.
Animal wakes
There are wake sightings that occur when the loch is dead calm with no boat nearby. A bartender named David Munro claims to have witnessed a wake which he believed to be a creature zigzagging, diving and reappearing. (There were 26 other witnesses from a nearby car park). Some sightings describe the onset of a V-shaped wake, as if there were something underwater. Moreover, many wake sightings describe something not conforming to the shape of a boat. Under dead calm conditions, a creature too small to be visible to the naked eye can leave a clear v-shaped wake. A group of swimming birds can give a wake and the appearance of an object. A group of birds can leave the water and then land again, giving a sequence of wakes like an object breaking the surface, which Dick Raynor says is a possible explanation for his film.
Optical Effects
Wind conditions can give a slightly choppy and thus matt appearance to the water, with occasional calm patches appearing as dark ovals (reflecting the mountains) from the shore, which can appear as humps to visitors unfamiliar with the lake. In 1979, Lehn showed that atmospheric refraction could distort the shape and size of objects and animals, and later showed a photograph of a rock mirage on Lake Winnipeg which could easily represent a head and neck.
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http://en.wikipedia.org/wiki/Loch_Ness_Monster
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