Where was it first discovered that the earth's ozone layer was being depleted?

Why did Congress need to establish the Continental Army

President vowed to send a man to the moon by the end of the 1960s

What is a presidential republic government?

What nation had tried to build a canal prior to the United States?

Which U. S. actions violated the constitutional rights of some citizens during World War II? tapping the phones of suspected communists without warrants preventing Movietone News from showing casualties being returned home arresting protesters who

Which Chinese leader is most closely associated with leading the Great Leap Forward and the Cultural Revolution? (1) Sun Yixian (Sun Yat-sen) (2) Jiang Jieshi (Chiang Kai-shek) (3) Mao Zedong (4) Deng Xiaoping

By the early 20th century, which country's empire encompassed one-fifth of Earth's landmass?

What were the main causes of the French Revolution?

What marks the beginning of organized government?

Why did Egypt's main crops of papyrus and cereal best contribute to the development of civilization