In the early 1970s, David Lee (1974) provided evidence that time to contact is specified by an optical variable, which he termed .

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.

What would happen if people from different races were seperated today

Which of the following is a sign of a weak economywhich of the following is a sign of a weak economy