Rice was a staple crop in the ancestral Austronesian regions of Taiwan and Island Southeast Asia, but it was unknown in any of the Pacific Islands at the time of European encounters, with the exception of the unique case of Guam and the Mariana Islands. New research by scientists from Guam, China and Australia confirms the presence of abundant rice husk and leaf phytoliths adhering to red-slipped pottery found in Ritidian Beach Cave in Guam, dated...