How Agriculture Spread around the World (IMAGE) University of Washington Caption This time-lapse map shows how extensive agriculture (noncontinuous cultivation, or the "beginnings" of farming) spread as a percentage of land use. To highlight land use in Oceania, four groups of islands are represented by icons. Credit Nicolas Gauthier/Arizona State University for ArchaeGLOBE Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.