El Nino is a natural phenomenon that takes place every few years in the Pacific Ocean. El Nino consists in a slight warming of the eastern Pacific Ocean surface and high air pressure over the western Pacific Ocean. The opposite variations in western Pacific water temperature (lower temperature) and surface air pressure (lower pressure) is called anti-El Nino or La Nina. The two climate variations occur at different time intervals, but the average distance between two phenomenon is five years. (more…)
Archive for March, 2011
Tennis is a very popular sport played at many ages having a great advantage: it can be played throughout the year and on different types of surfaces. The four grand slam tournaments attract many viewers on the court and on television. The Australian Open, French Open, Wimbledon and the US Open finals not only fill the court tribune but are also broadcasted live in many countries reaching millions of fans. As in any other sport, in tennis there are some notable players and important records. (more…)
The very first airplane operating airline in the world was the Dutch company named Koninklijke Luchtvaart Maatschappij also known as KLM. The popular Dutch airline operated its first flight in May 1920. Since then dozens of different airlines emerged transporting millions of people around the world. Although the number of flights and travelers constantly increased, the air transportation is not profitable and the whole industry survived only thanks to state support.
The top ten airlines in the world are: (more…)
The solar flares represent explosions at the surface of the sun. The solar flares are produced almost every day and they usually affect all layers of the sun’s atmosphere. The large ones release huge amounts of energy and could even eject coronal mass into the space. The solar flares also produce different types of radiation that also burst into the space.
The UV and X-ray radiation produced by large solar flares can reach the Earth affecting the upper layer of the atmosphere called ionosphere. These two types of radiation can disrupt long-range radio communications and radars that have the same wavelengths. (more…)
The democracy represents a political system in which all the people of the country have equal control over the national matters through referendum and elected representatives. The history of democracy starts in ancient Greece where Athenian citizens had the right to vote the laws of state in the Assembly.
The democracy has come a long way since that ancient times and now most countries are democratic. Now the most important features of democracy include civil liberties, politic rights, freedom of press and the low level of corruption. These features differentiate the states by the level of democracy implemented. (more…)