Christopher columbus was born in Genoa in 1451 to a wool merchant. he was a teenager when he got a job on a merchant ship. he remained at sea until 1470 when french privateers sailed it north along portuguese coast. The boat sank but young columbus floated on a piece of wood scrap and made his way to Lisbon where he began to study mathematics astronomy, cartography, and navigation. He also stated to hatch the plan that would change the world forever.
Its pretty obvious the biggest achievements/discoveries was finding North America. columbus had the idea of sail west along the atlantic instead of around the huge african continent. columbus argued (incorrectly) that the circumference of the earth was much smaller than his contemporaries he believed that the journey by boat from Europe to Asia should be easy. It took till 1491 for Columbus to get a sympathetic audience. he wanted fame and fortune and the opportunity to export catholicism across the globe. on october 12 the ship made landfall but not in asia in what is now america.
impact on world today
Christopher Columbus kicked off centuries of exploration. today columbus has a mixed legacy he is remembered as a daring explorer who discovered the new world yet his action unleashed changes that would hurt the native population for centuries that him and his explorers encountered
I got my main information from http://www.history.com/topics/exploration/christopher-columbus and I got my pictures from