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1900-1933
   1903
     Probably the most famous of all the inventions in this time period was the Wright Brothers' Airplane.  It was an important step in the technological evolutions of man kind.  It led to many later inventions and innovation that sparked the space age.
     The Wright Brothers were only Bicycle Mechanics, but in their spare time dreamed about flying. After being influenced by Otto Lilienthal's attemps at flying,  they started researching the idea and spent a lot of their spare time drawing designs and experimenting.  They finally got to a point where they wanted to build an airplane and they thought they could. 
     They gave up their jobs as bicycle mechanics and moved to Kittyhawk, North Carolina where geography was ideal because of sand dunes and and constant good weather records.  Then they really got to work.  They were experienced mechanics, so they knew how an engine worked, and what was needed to power it.  That part was done.  Next their research in feilds such as aerodynamics paid off.  They found a light enough engine that it would not effect lift ratio, they mounted it, made propeller shafts and propellers, and cut cloth and fitted it to a wood frame that would support the craft and shape the wings.  After trial and error, and after much time, their plane worked.  It flew a distance of 852 ft., and it was the first succesful flight ever completed.
1906
     At one time, the only way people knew what was going on in the world was by mail or newspaper.  They always were late with the news.  When they heard about something, it usually had happened weeks before. But then something made faster news possible. The triode amplifier tube, or radio, was the invention that made that possible.
     As an improvement to the diode tube, which maintained an electromagnetic field between two electrodes.  All Mr. Forest did, was he added an extra electrode between those to.  That made it possible to amplify an electromagnetic signals and not just rectify it.  Because of that invention, things like the radio could be invented and electronics were more commercially feasible.
     1926
    For hundreds of years people lived with the solid fuel, or gunpowder type rocket  that was developed by the Chinese in the 13th century. So did Dr. Robert H. Goddard, the New England physics professor and American rocket pioneer. As early as 1909, however, Goddard considered the idea of a liquid fuel rocket utilizing hydrogen and oxygen. 
     In his studies, he recognized that solid fuels produced a lower exhaust velocity then that of liquid fuels. After 17 years of theoretical and experimental work, Dr. Goddard finally achieved flight of a liquid fueled rocket on March 16, 1926.