exploration by will k 5-4 By stagnesny Nov 21, 1271 marco polo goes to china marco polo was a merchant in venice italyhe was only 17 Period: Nov 21, 1271 to Nov 21, 1522 exploration Nov 21, 1405 zheng he explores zheng he traded goods such as gold and silk Nov 21, 1454 printing press was invented it was made in the renaissance time. it was invented by johannes gutenberg.
