It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.

• Robert H. Goddard

Robert H. Goddard

U.S. professor and scientist, was a pioneer of controlled, liquid-fueled rocket. He launched the world’s first liquid-fueled rocket on March 16, 1926. From 1930 to 1935 he launched rockets that attained speeds of up to 885 km/h (550 mph). Though his work in the field was revolutionary, he was sometimes ridiculed for his theories. He received little recognition during his lifetime, but would eventually come to be called one of the fathers of modern rocketry for his life’s work.

from - Wikipedia

PS. Sorry this entry will not post in Thai