Called "the mother of the civil rights movement," Rosa Parks invigorated the struggle for racial equality when she refused to give up her bus seat to a white man in Montgomery, Alabama. Parks' arrest on December 1, 1955 launched the Montgomery Bus Boycott by 17,000 black citizens.
In the development of a terrestrial planet, the stage of *flooding* occurred when dense material settled to the core and less dense to the outer parts.
