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Leonardo da Vinci is famous for creating some of the most incredible works of art. But besides being a brilliant artist, Da Vinci was also a scientist, engineer, and inventor. He may well have been the greatest inventor in history. Da Vinci drew sketches and diagrams of his inventions, which he preserved in his notebooks. Unfortunately, almost none of Da Vinci's inventions were built during his lifetime. And, because he never published his diagrams, nobody else knew about them until his notebooks were discovered long after his death. That's a pity, because da Vinci's designs were spectacularly ahead of his time. If they had been built, they might have revolutionized the history of technology, In recent years, however, engineers have begun to construct models of da Vinci's amazing machines and most of them actually work. PARACHUTE The invention of the parachute is traditionally credited to Leonardo da Vinci although he wasn't the first to come up with the concept. However, Leonardo's parachute was more sophisticated and in 2000, the British skydiver Adrian Nicholas proved that it works by jumping with a parachute built according to da Vinci's sketches. ORNITHOPTER Da Vinci came up with plans for a number of flying machines including ornithopters. Inspired by birds and bird flight, Leonardo's ornithopter was to be lifted and operated by flapping wings which in turn would be "powered" by muscle energy. ROBOTS What da Vinci built were not robots in the modern sense. He built a self-operating machine called automaton which, however, was capable of moving without human help. MACHINE GUN Leonardo's machine gun was nothing like the modern machine guns. Rather than firing bullets rapldly from a belt, it was meant to fire bullets from individual guns that were connected in three rows, with each row containing 11 guns.DIVING SUIT Dst like in the case of the parachute, Da Vinci wasn't the i to come up with the idea of a suit that allows its wearer to breathe underwater. But again, his design is strikingly similar Dthe early prototypes of the modern diving suit: it consisted of a (leather) jacket, pants and helmet with inbuilt glass goggles, and a breathing tube that supplied air from the surface. ARMORED VEHICLE The tank was first used during World War I (1914-18) but the concept, or according to some, the first prototype was developed by Leonardo da Vinci more than 500 years earlier. Leonardo's tank was designed to be equipped by a series of guns and "driven" by the men inside. Although some believe that he didn't really want the war machine to be built, while others think that he perhaps wanted to prevent the design from falling into the wrong hands.​

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Learning a foreign language is not easy. It is a long and slow process that requires a lot of time and effort. Nowadays it is especially important to know foreign languages. ..some people learn languages because they need them for work, others go abroad, for others, learning languages is a hobby. ..everyone who knows foreign languages can communicate with people from other countries, read foreign writers in the original, which broadens their horizons. It is not surprising that many intellectuals and educated people are polyglots. I am learning English. ..nowadays English has become the most important language in politics, science, trade and cultural relations. More than 300 million people speak it as their first language. ..native English speakers live in the UK, United States of America, Australia and New Zealand. English is one of the official languages in the Republic of Ireland, Canada, and the Republic of South Africa. ..English is one of the official languages of the United Nations and other political organizations. Half of the world's scientific literature is written in English. It is the language of computer technology. ..to know English today is absolutely necessary for every educated person, every good specialist. English is a wonderful language. This is the language of great literature. ..it is the language of William Shakespeare, Jonathan Swift, Walter Scott, Charles Dickens. The great German poet Goethe once said: "He who does not know a foreign language does not know his own." ..therefore, to understand yourself and the environment, you need to learn foreign languages. 2. ask a few questions