Have you tried the national dish gofio while on holiday on the Canary Islands? If so, you have eaten the same food as the original inhabitants ate, nearly 2,000 years ago. The island farmers have cultivated the same types of grain for over a thousand years. This is the conclusion drawn by researchers from Linköping University in Sweden, working together with researchers from the University of Las Palmas de Gran Canaria in Spain, after DNA analyses of prehistoric seeds.