https://www.forbes.com/sites/brucedorminey/2021/04/21/da-vinci-and-sikorsky-also-deserve-credit-for-nasas-mars-helicopter/
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4/21/21 at 10:51pm
Organization
Forbes
Author
Bruce Dorminey
NASA's Ingenuity Mars copter makes giant leap for mankind, but da Vinci and Sikorsky are also due credit for help making it happen.
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