Mariana Trench, the deepest point on earth

The Mariana Trench, which is the deepest point on earth and home to many living things, is seen as one of the most feared but equally curious points in the world with its mysterious and frightening side.

Concern for China in Japan: The biggest strategic challenge

The development of Sino-Russian relations at a time of high tension in the Pacific raises Japan's concerns. Japan to describe China's regional influence as "biggest strategic challenge" in annual foreign policy report.