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Approx 284 yrsDuring the mid 1500's, Italian inventor Leonardo Da Vinci made drawings of an ornithopter flying machine that some experts say inspired the modern day helicopterIn 1784, French inventor, Launoy and Bienvenue created a toy with a rotary-wing that could lift and fly and proved the principle of helicopter flight
Mozart was 8 years old when he wrote it
Answer - radioactivity
Answer - His explanation of the photoelectric effect
2001 - A space Odyssey:Sir Arthur C. Clarke's most famous prediction on the future is his proposal of geostationary satellite communications published in the Wireless World magazine in 1945. Not considered seriously at the time it became a reality within 20 years with the launching on 1965 April 6th of Intelsat IEarly Bird the first commercial geostationary communication satellite.
Answer – He was 18 years old
Top (white)- same as writing is TswanaSecond (brown) is SesothoThird (red) is Tsonga