PBS's 'Vikings Unearthed' Uncovers Clues of Expeditions | Trailer

The new NOVA special searches for clues of Viking expeditions to the Americas and more. Streams live on pbs.org/nova on April 4th (3:30pm ET) and on PBS April 6th (9pm ET).

via LiveScience.com http://ift.tt/1pZThqR