Which region in West Africa borders the Sahara? What kind of climate does it have?

What were the main features of the aristotelian-ptolemaic model of the cosmos

What artifact did modern scholars study to them understand hieroglyphics

Which describes a contribution from classical rome to modern western civilization? a. international gathering to celebrate sporting achievement b. written constitution based on natural rights c. large infrastructure projects to benefit the public d. direct election of the ruler by all residents of the empire