17. why is the earth's history separated into so many different sections of time?

How is frances culture important to its economy

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel

Read the article titled "castro resigns." why did the us impose trade sanctions against cuba in 1962?