Original sentence: L'Anse aux Meadows is the only known Norse site in North America outside of Greenland, represents the furthest known extent of European exploration and settlement of the New World before the voyages of Christopher Columbus and John Cabot almost 500 years later, and is the only generally-accepted evidence of pre-Columbian contact between the New and Old Worlds
Edited sentence: L'Anse aux Meadows is the only known Norse site in North America outside of Greenland, represents the furthest known extent of European exploration and settlement of the New World before the voyages of Christopher Columbus and John Cabot almost 500 years later, and is the only genuine evidence of pre-Columbian contact between the New and Old Worlds