What year was the weapon "gun" invented?

What create a global village and the emergence of a new international popular culture

How did critics view the judicial reform bill under roosevelt?

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.