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In page Aeronautics:

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These developments, along with growing international interest, helped lay the groundwork for the later work of Horatio Phillips among others, but more importantly of Otto Lilienthal, a German engineer and businessman who became known as the "flying man".[2] He was the first person to make well-documented, repeated, successful flights with gliders,[3] therefore making the idea of "heavier than air" a reality. Newspapers and magazines published photographs of Lilienthal gliding, favourably influencing public and scientific opinion about the possibility of flying machines becoming practical.[citation needed]