Rowing like Vikings in the name of science

A Viking museum in the German town of Busdorf has welcomed the largest reconstruction of a medieval long-ship, the Havhingsten, or Sea Stallion.

30 metres long and using only the technology available a thousand years ago, it sailed from Denmark to participate in a festival of square rigged ships.

The gruelling experience of its crew of 60 allowed experts to gain insights into the life of Viking seamen.

Tom Donkin reports.