How Did Vikings Heat Their Ships on Icy Seas Without Fire?

Transcript

The North Atlantic in winter, 1000 CE, waves the size of buildings crash against a wooden longship as temperatures plunge below freezing. Ice forms on the rigging, beards freeze solid, breath crystallizes in arctic air. For weeks at sea, crews are exposed to conditions that would kill a modern person in hours. They have no cabin, no shelter, no wal... Read More