How were the trade systems of the early river valley civilizations organized?

In 1637, colonists killed between 500 and 600 american indians in connecticut

Andreus vesalius is known for being the first scientist to provide detailed and accurate information about human anatomy. his knowledge of human anatomy came from dissecting human bodies. which statement best shows why andreus vesalius’s discovery was important during the scientific revolution?

What two advances did europeans borrowed from china