Who were they?

The Vikings were the same Germanic origin as the Anglo-Saxons themselves. They arrived from the Scandinavia, Norway, Sweden and Denmark

They were skillful sailors navigating the stormy north Atlantic with only the stars and seabirds to guide them.
They descovered America 5 000 years before Christopher Columbus.

http://www.etoday.ru/uploads/2008/08/04/viking_festival_spain02.jpg