On May 4, 1886, a labor<span> protest rally near Chicago's </span>Haymarket<span> Square turned into a</span>riot<span> after someone threw a bomb at police. ... The </span>Haymarket Riot<span> was viewed a setback for the organized </span>labor movement<span> in America, which was fighting for such rights as the eight-hour workday.</span>
A Heliocentric Theory. By 1532 Copernicus had mostly completed a detailed astronomical manuscript he had been working on for 16 years. He had resisted publishing it for fear of the ensuing controversy and out of hope for more data.
The heliocentric model was generally rejected by the ancient philosophers for three main reasons: If the Earth is rotating about its axis, and orbiting around the Sun, then the Earth must be in motion. However, we cannot ``feel'' this motion. Nor does this motion give rise to any obvious observational consequences.
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In the early twentyith century alot of immigration caused a mass boost in population in the united states.
Henry Clay proposed a compromise balancing the slave states and the free states.
