In school we all learned about Christopher Columbus sailing the ocean blue in 1492.But there were plenty of people who arrived before he did. Nearly 500 years before Columbus got here, there was Leif Ericson. Historian John Schmidt tells us about the Norse explorer. (photo: "LeifErikson1968stamp" by United States Post Office DepartmentOriginal uploader was Jonathunder at en.wikipedia - Licensed under Public domain via Wikimedia Commons - )