Complex sentence: At some 900 miles distant, Tabuaeran is one of the closest landfalls to the Hawaiian Islands, and the atoll was possibly used as a stopover by the Polynesians who first settled Hawaii.
Split into simpler sentences: At some 900 miles distant, Tabuaeran is one of the closest landfalls to the Hawaiian Islands. The atoll was possibly used as a stopover by the Polynesians who first settled Hawaii.