Archimedes. Why in the first place was the ancient Greek scientist? First of all, because he is one of the greatest mathematicians of all times, close he came to the calculation of the number of "PI". Today all students and students of the daily study and enjoy the discoveries of the Greek. Also Archimedes was famous for the invention of many useful machines. Among these are the siege guns, and mirrors, поджигающие sails on the Roman ships by focusing sunlight. Archimedes made the first theorist of mechanics. For example, he presented the complete theory of the lever, applying it in practice. Also, scientists have developed a Archimedes screw (screw), with the help of which вычерпывается water and the present day. The primacy of the inventor of merit - all of it was opened more than two thousand years ago, when there were no computers, no technology available today, the inventors. Archimedes, perhaps, he studied in the libraries of Alexandria, but most of his knowledge was acquired independently.
The Halloween festival has roots in Celtic traditions. More than 2,000 years ago, the Celts in Britain held a special holiday in late October to mark the start of winter. START Another fall has been very much about the passing of the dead. These two events later became Halloween. HOLIDAYS In Halloween, children often dress in ghosts, witches and monsters, and go around people's homes, asking for sweets. In most cases, ghosts and witches are not scary at all, they are not real! FUN But keep in mind that if kids don't get sweets, they can make a terrible joke, such as splashing some water on you. APPLICABLE Pumpkins are also a symbol of Halloween. SYMBOL People make lanterns for them. Usual
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