Konstantin Tsiolkovsky
Man must at all costs overcome the Earth's gravity and have, in reserve, the space at least of the Solar System.
More quotes and aphorisms
The promise given was a necessity of the past...The key is to keep company only with people...Change before you have to...The cautious seldom err...People have to render judgment. In my case, I've said...In the 20th century, the United States endured...
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