In the depths of the remote southwest Pacific Ocean there flows the world's largest deep ocean current, one that is 100 times the size of the mighty Amazon River. Racing at depths between 2,000 and 5,500 meters the Deep Western Boundary Current (DWBC) forms part of a global system of ocean circulation which distributes heat around the planet, and may play a key role in controlling climate change. This current channels 40% of the world's newly formed cold deep water to the oceans. The DWBC's role in controlling these climatic changes will be studied by a team of 26 scientists representing nine countries during the next research expedition of the Ocean Drilling Program (ODP).