Finally, at the very top of the world lies the Arctic Ocean. It is the smallest and shallowest of the five, mostly contained within the Arctic Circle. Because it is covered in sea ice for much of the ...
SYDNEY - China is conducting a vast undersea mapping and monitoring operation across the Pacific, Indian and Arctic oceans, building detailed knowledge of marine conditions that naval experts say ...
MSN: China maps ocean floor as it prepares for submarine warfare with US
China maps ocean floor as it prepares for submarine warfare with US