The major challenges to historical research revolve around the problems of sources, knowledge, explanation, objectivity, choice of subject, and the peculiar problems of contemporary history. Sources The problem of sources is a serious challenge to the historian in the task of reconstructing the past.
Answer - Three factors fueled American Imperialism.
Economic competition among industrial nations.
Political and military competition, including the creation of a strong naval force.
A belief in the racial and cultural superiority of people of Anglo-Saxon descent.
Answer by YourHope:
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Question: Although he was killed in the Philippines, _____ is still known as the first man to circumnavigate the globe.
Answer: A) Ferdinand Magellan!
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Cactus Hill site has human remains that have been dated to around 20,000 years ago. Given its location in Virginia shows that human beings had reached America earlier than this. This contradicts the theory that postulates humans came to America from Siberia through the modern day Bring Strait. The theory asserts that at the end of the Ice age humans were able to cross to America through the Beringia land bridge and other means such as canoes and rafts around 10,000 years ago.
