Many of these men were interested in a way of achieving higher altitudes than were possible for lighter-than-air balloons. Others saw the chance to enhance the military power. Other saw the opportunity to get to see the universe. For example, Robert H. Goddard conducted a variety of practical experiments in rocketry and he published <span>a mathematical analysis of what is today called the </span>meteorological sounding rocket. Konstantin Tsiolkovsky proposed the idea of space exploration by rocket and he suggested the use of liquid propellants for rockets in order to achieve greater range.<span> Because of Oberth's work, many small rocket societies sprang up around the world</span>
Nat Turner's Rebellion was a slave ... The state executed 56 slaves accused of being part of the rebellion, and many ... He witnessed a solar eclipse on February 12, 1831 and was convinced that it ... alarm led to whites' attacking blacks throughout the South
