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Residents of Puerto Rico pay U.S. federal taxes: import/export taxes, federal commodity taxes, social security taxes, therefore contributing to the American Government. Most Puerto Rico residents do not pay federal income tax but do pay federal payroll taxes (Social Security and Medicare). However, federal employees, those who do business with the federal government, Puerto Ricobased corporations that intend to send funds to the U.S. and others do pay federal income taxes. Puerto Ricans may enlist in the U.S. military. Puerto Ricans have participated in all American wars since 1898; 52 Puerto Ricans had been killed in the Iraq War and War in Afghanistan by November 2012.

What types of taxes do Puerto Ricans pay?
Answer: U.S. federal taxes
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On July 25, 2015, the 18th and 19th satellites were successfully launched from the Xichang Satellite Launch Center, marking the first time for China to launch two satellites at once on top of a Long March 3B/Expedition-1 carrier rocket. The Expedition-1 is an independent upper stage capable of delivering one or more spacecraft into different orbits.

What is the Expedition-1?
Answer: an independent upper stage capable of delivering one or more spacecraft into different orbits
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The Scientific Revolution was a period when European ideas in classical physics, astronomy, biology, human anatomy, chemistry, and other classical sciences were rejected and led to doctrines supplanting those that had prevailed from Ancient Greece to the Middle Ages which would lead to a transition to modern science. This period saw a fundamental transformation in scientific ideas across physics, astronomy, and biology, in institutions supporting scientific investigation, and in the more widely held picture of the universe. Individuals started to question all manners of things and it was this questioning that led to the Scientific Revolution, which in turn formed the foundations of contemporary sciences and the establishment of several modern scientific fields.

What s the Scientific Revolution?
Answer:
a period when European ideas in classical physics, astronomy, biology, human anatomy, chemistry, and other classical sciences were rejected