A man repairs a 10-meter wooden row boat, built in the Nordic clinker boat tradition, at the Viking Ship Museum's boatyard. Roskilde, Denmark, Monday, Jan. 17, 2022. For thousands of years, wooden sail boats, best known for having been in use during the Viking-era, allowed the peoples of northern Europe to spread trade, influence and -- in some cases war — across the seas and rivers. In December, UNESCO, the U.N.’s culture agency, added the “clinker’ boat traditions to its list of “Intangible Cultural Heritage,” the result of the first joint nomination from the whole Nordic region. (AP Photo/James Brooks)
