One scientific belief held by both rene descartes and isaac newton is that

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.

Kennedy singles out one group of countries that the united states will defend against any attacker what countries are they

What two advances did europeans borrowed from china