The vikings boats were flexible they could bounce on the waves in storms.A hoard of coins was found in Sweden in 2008 they were really old and they were buried in around AD 850.A viking settlement was found in a sight called Newfoundland in Canada.
The vikings used longships for raiding. They also used the knarr for cargo and animals because it was so strong and sturdy. These things are the vikings secret wepons. The vikings boats were flexible and strong , it only needed to be 2-3 cetimeters.
The vikings cam from lands called Norway,Sweden and Denmark. They also used longships to travel along the sea.