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Abu Ja'far al-Khwarizmi Abu Ja'far al-Khwarizmi was an Arab mathematician who lived between AD 780 and 850. At a time when the spread of ideas was difficult, al-Khwarizmi wrote a book which contained many important mathematical concepts of the Middle East. This book changed all of European mathematics, introducing the decimal system and rules for doing algebra. 'Abd al-Rahman al-Sufi 'Abd al-Rahman al-Sufi was a Persian astronomer who lived during the 10th century. He was the first person to observe the Andromeda galaxy, our closest neighbor, and called it "little cloud". Al-Sufi's book on stars was translated into many languages and had a big influence on European astronomy. Leonardo Fibonacci Leonardo Fibonacci was an Italian mathematician who lived between 1170-1240. He travelled a lot on business with his father and was exposed to many different mathematical ideas. Fibonacci put all these ideas together, in books, so that anybody could learn them wit...

Pythagoras Pythagoras was a Greek philosopher who lived between 580-520 B.C. He believed that everything was related to mathematics and once said "all is number". Pythagoras started a school in Greece, which had many students and made great contributions to the field of mathematics. He is most famous for his proof of an important formula in geometry. Archimedes Archimedes was a Greek mathematician and engineer who lived between 287-212 B.C. His greatest contributions are in the field of geometry, where he did much work with circles and their properties. Legend has it that Archimedes discovered a famous theory while taking a bath. He was so excited that he ran naked through the streets of Syracuse shouting "Eureka, eureka (I have found it)!". Aristotle Aristotle was a Greek philosopher who lived between 384-322 B.C. He was one of the greatest thinkers of the world and wrote on every major area of thought. Aristotle thought that the Earth was at the center of the u...

GEOGRAPHY..... When we talk about it, it sounds like earth. Something about the Earth... its surface, its structure, its temperature. The wind, perhaps... Or even the grass that covers the land? but I wonder... One day if the earth is badly damaged. There are plastic bottles everywhere, people wear mask because the ait is polluted. Do you want this to happen? Have you ever wondered how long has the earth exist? for us.... for our living? Then, what happens? WAR!!! It is not the way.... Stop it. Have a look at the earth photo... It have changed! Is this the place that we call home sweet home ? Where is the place that you pledge will be the best place to your only son or your next generation? Think about it... What have we done to the world? Look at what have we done...

Michael Jackson - You Are Not Alone * Tribute * 1958-2009 You Are Not Alone lyric: Another day has gone I'm still all alone How could this be You're not here with me You never said goodbye Someone tell me why Did you have to go And leave my world so cold Everyday I sit and ask myself How did love slip away Something whispers in my ear and says That you are not alone For I am here with you Though you're far away I am here to stay But you are not alone For I am here with you Though we're far apart You're always in my heart But you are not alone 'Lone, 'lone Why, 'lone Just the other night I thought I heard you cry Asking me to come And hold you in my arms I can hear your prayers Your burdens I will bear But first I need your hand Then forever can begin Everyday I sit and ask myself How did love slip away Something whispers in my ear and says That you are not alone For I am here with you Though you're far away I am here to stay For you are not alone F...