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The theory of relativity is one of the most important scientific advances of all time. It is broken up into two separate theories called special relativity and general relativity. It was such as revolutionary theory because it showed that time is not uniform or absolute. For example, there are two 25 year old twins and one travels through space at 90% of the speed of light for 20 years. They would arrive back on Earth as a 45 year old, but the twin who stayed on Earth would be 71 years old! It is very hard topic to understand, and explain, so I have posted a video at the end of this article with a fairly simple explanation.

Kazakhstan is a large country located in both Asia and Europe. It was a part of the Soviet Union (USSR) and became independent after the USSR collapsed in 1991. The following are some fun facts about the country Kazakhstan.

The Scream is a famous painting that was produced by the painter in various different forms. There are two official versions that were painted and another two produced in pastel. The artist also created a lithograph version of the painting. In the late 20th century The Scream became an iconic image in popular culture, but it gained even more attention when the original versions became the target of two high profile art thefts in 1994 and 2004. Both of the stolen versions of the painting were eventually recovered and put back on public display. If you want to know who painted this iconic image, keep reading to find out.

There are approximately 3000-6000 languages spoken on Earth today. Some of these are spoken by small tribes of people and others, like English, are spoken by millions of people worldwide. Many languages are closely related and others borrow words from many different languages. If you have ever wondered which language has the largest vocabulary (set of words), keep reading to find out.

Greece is a country in the south-east of Europe that is directly below the countries of Albania, Macedonia and Bulgaria. Greece is also made up of many islands and over 220 of these have a permanent population. The country has a rich history that dates back to the earliest civilizations of Europe. The following are some fun facts about Greece that you might find interesting.

The Last Supper is a famous mural that depicts a scene from the Bible where Jesus shares a meal with his 12 disciples and foretells of his betrayal and death. It is painted on a wall in the dining hall of a monastery called Santa Maria delle Grazie in Milan, Italy. It is the most widely reproduced religious painting of all time. The painting has gained further popularity in recent years due to the alternate, and sometimes controversial , theories about the painting. If you want to know who painted the Last Supper, continue reading to find the answer.

Portugal is the westernmost country in Europe which is bordered to the East by Spain. It is a member country of the European Union and the United Nations. Portugal has a long and rich history as a nation as was once a genuine Superpower of the world. The following are some fun facts about Portugal.

Ecuador is a small country in South America. It is located on the western side of the continent and is bordered by Colombia and Peru. The Equator runs through the country and that is where Ecuador gets its name. The following are some fun facts about Ecuador.

Colombia is a country located in South America. It is located south of the Caribbean Sea and west of Venezuela. The Equator runs through the south of the country. The area has a rich and interesting history from colonization through to today. The following are some facts about Colombia.

The Mona Lisa is one of the most famous paintings in the world. Today it is on display at the Louvre in Paris, France and is not likely to be moved. The painting is widely believed to be a portrait of Lisa del Giocondo, who was the wife of a wealthy silk merchant in Italy. However, there are many alternative theories behind who is the subject of the painting. Countless copies and caricatures have been created of the painting and this has only increased the popularity of the Mona Lisa. Have you ever wondered who painted the Mona Lisa? Continue reading to find out.