The chopping of wood at L Anse aux Meadows, in Newfoundland, Canada was dated to 1021 AD using a radiocarbon signal in trees from a solar storm, experts from the University of Groningen said.
A monk in 14th-century Italy wrote about the Americas economist.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from economist.com Daily Mail and Mail on Sunday newspapers.