Who was Coretta Scott King--and what role did she play in her husband's civil-rights efforts?

What were the factors that contributed to this year's record warm average temperature in the United States for the month of January?

Why was Shakespeare so popular a playwright in his day? Are these the same reasons his works endure today?

For decades, teachers have asked students similar questions that can be answered only by doing extensive research outside their textbooks. Sometimes, their intent is to generate a deeper understanding

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