世界未解之谜英文ppt

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Methane Hydrates(沼气泡新观点) :
Many of the late researches and lab experiments have blamed the presence of methane hydrates for the mishaps(灾祸) in the region(地区). This theory states that the enormous eruptions(巨大喷发) of methane bubbles(沼气泡) may produce regions of frothy water around the ship ultimately leading to its rapid sinking(下沉). Likewise, the aircraft falling victim to these bubbles will lose their engines and immediately lose their lift as well, ultimately leading to a swift plummeting(骤然下跌).
And this made the government of Cuba very nervous.They treated it as a secret weapon(秘密 武器) from Ameria and made it touched down.
At the same time,the two balloon driver were also confused,they said they participated in a ballute race,and suddenly felt a little pain,then they saw the blue sky and a plane which make them down.
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Forecast (预言说) : Some people believe that there is a mysterious power behind the crop circles , according to this guess, some people think that crop circles are "disaster forecasts".
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Alien manufacturing (外星制造说): Many people believe, crop circles are mostly formed overnight, is likely to be extraterrestrial(天外来客). Allegedly,where appeared crop circles where it will appear UFO.
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Artificial (人造说) ： Quite a part of people think that, the so-called crop circles are just some people‘s practical joke. British scientist Andrew through 17 years of investigation thinks, crop circles have 80% belongs to man-made.
The World of Unsolved Mysteries
———The Fourth Group
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The unsolved mystery of
Berwenku.baidu.comuda Triangle
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The interest and intrigue(诡秘) for the
Bermuda Triangle(百慕大三角) has been global agenda for many decades now. The tragic(悲剧的)incidences and mishaps(灾祸) attached to the Bermuda Triangle have also given it the second name of Devil’s Triangle(魔鬼三角洲).
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Although Bermuda Triangle is one of the most
mysterious places in the world and many people would like to visit this place but on the other side there are many people who would never like to be there. What’s your plan?
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Later, a PBM Mariner Flying Boat exploded (爆 炸)while searching for them having 13 crew members. None of the investigators was able to tell the reason behind this terrible incident.
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Yes,there was a ballute race at Caribbean(加勒比 海) in 1954.It was a lovely day for the race,but suddenly one of the ballutes disappeared from the sky. That is to say the two drivers had flied from 1954 to 1990 unconsciously.
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Only the crop bend.
弯曲
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Cell structure in the stalk was changed
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Mild burns
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In Crop Circles production has increased fourfold
GO
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The world for the cause of the circle also has a variety of views.About the causes, mainly have five kinds of views.
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Do you want a chance to travel through time?
Let's read a real story happened there.
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In 1990,there was a ballute(热气球式降落伞) suddenly appeared at the area of Cuba(古巴).
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• The most famous “Flight 19″ Incident:
On 5th December 1945, five TBM Avenger torpedo bombers（”复仇者“鱼雷轰炸机） having 14 airmen suddenly disappeared during a training session while flying over the Bermuda Triangle.
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• Bermuda Triangle Theories:
Over the years, scientists and other researchers have cited(引用)different natural explanations for these disappearances.Some of these include: Compass Variations （罗经磁差）: The theory opined that the Bermuda Triangle is one of the two places on earth at which a magnetic compass(罗 盘) points towards true north rather than the usual magnetic north. This difference or vibration(振动) between the two, put at almost 60 degrees, came to be termed as compass variation.
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As the mysterious disappearances of ships and aircraft in the region,the Bermuda Triangle is notoriously(众所周知地) known.
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• Where is the Bermuda Triangle located? Located in the western part of the North Atlantic Ocean, the apexes(顶端) of the triangle are generally believed to be Bermuda; MiamiFlorida(佛罗里达州); and San Juan-Puerto Rico(波多黎 各).
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The tornado (龙卷风说) : From the relevant records, the season crop circles appeared most frequently are spring and summer, some people think that summer weather, constantly changing, the main reason caused the circle is the tornado.
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Gulf Stream （墨西哥湾流）:
A strong ocean current（气流） originating from the Gulf of Mexico called the Gulf Stream has also been held responsible for the unexplained disasters. The current is extremely swift（迅速的）, turbulent and known to have a surface velocity（速率） of around 2.5 m/s. However, it is theorized（推理） that such a current can carry away only small planes landing in water or boats with some engine trouble(发动机故障).
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The unsolved mystery of
Crop Circles
How the circles are made ?
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Who makes them?
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Tai Chi
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Crop circles （麦田怪圈）are in a field of wheat or other crops, through some force to flatten（压平） and crops produce geometric patterns（几何图纹）. This phenomenon in the late 1970's began to attract public’s attention.
Magnetic field (磁场说): The experts think that, the magnetic fields have a magical mobile force, can produce an electric current(电流), make crop" flat" on the ground.