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How invisible particles can be observed in outer space. ... We call this invisible mass dark matter since it cannot reflect light. Gravitational effects are only way we can detect its presence.
Sylvia Mendez is an American civil rights activist who contributed to ending <u>school segregation</u>. Mendez is of Mexican-Puerto Rican heritage, and was not allowed to enrol in a "whites-only" school in California. At age eight, Sylvia and her family were involved in the case <em>Mendez v. Westminster</em> (1946). The case ended school segregation in California and contributed to the civil rights movement in other states. Sylvia Mendez was awarded the Presidential Medal of Freedom, the United States' highest civilian honor, on February 15, 2011.
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The UN does this by working to prevent conflict; helping parties in conflict make peace; peacekeeping; and creating the conditions to allow peace to hold and flourish. These activities often overlap and should reinforce one another, to be effective.
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