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Hard Leonardo Da Vinci's Inventions

What flying machine did Leonardo da Vinci design with four large wings driven by a human pilot?

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Intermediate Leonardo Da Vinci's Inventions

What self-propelled device did Leonardo da Vinci design for theatrical movement around 1490?

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Easy Leonardo Da Vinci's Inventions

What flapping-wing aircraft did Leonardo da Vinci study as a possible imitation of bird flight?

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Easy Leonardo Da Vinci's Inventions

What type of armored vehicle did Leonardo da Vinci design with conical cover and cannon openings?

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Intermediate World's Richest Companies By Market Cap

Which company was the first Asian internet company to surpass a US$500 billion market capitalization?

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