Archaeologist and anthropologist Terje Oestigaard travels down the Nile from the Egyptian capital Cairo through Sudan and up the Blue Nile to Ethiopia along the world’s longest river. Despite closer cooperation between the Nile Basin countries, tensions over water sharing are likely to increase as population growth, climate change and agricultural development in upstream countries place incremental pressure on water resources. Read more about Oestigaard’s work on the Nile in this report.