| Description |
States that only a lack of engineers and adequate materials kept the helicopter from being an actuality during da Vinci's lifetime. Pictures this great inventor creating workable plans for the helicopter, the submarine, and hundreds of other "modern" inventions--all backed by scientific data. According to Dr. Posin, Leonardo "was always lured by the subtle, the fleeting, the unknown--this was the artist in him. Yet he searched for exact reasons and causes and logic--this was the scientist."
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