Duluth, Minnesota four Catholic schools with coverage up to grades 6 or 8, two Protestant schools, two Montessori schools, and six other charter and private schools. Due to its proximity to the Great Lakes, Duluth is the location for the Large Lakes Observatory. The Large Lakes Observatory operates the largest university-owned research vessel in the Great Lakes, the R/V Blue Heron. Built in 1985 for fishing on the Grand Banks, the Blue Heron was purchased by the University of Minnesota in 1997, sailed from Portland, Maine, up the St. Lawrence Seaway to Duluth, and converted into a limnological research vessel during the
Duluth-Superior Dukes (1956–70) Duluth-Superior Dukes (1956–70) The Duluth-Superior Dukes were a minor league baseball team , based in Duluth, Minnesota that played from 1956 to 1970 in the Northern League. The franchise formed in 1956 as the Duluth-Superior White Sox after a merger of the Duluth Dukes and the Superior Blues. The team name was changed back to the Dukes in 1960. From 1960 to 1964, they were affiliated with the Detroit Tigers. In 1965, they were affiliated with the Tigers and Chicago Cubs. In 1966, they were affiliated with the Cubs. In 1967, they were affiliated with the Cubs and Chicago White