Model of deep sea submarine in China (detail)
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China's new deep sea submarine

BBC science correspondent Rebecca Morelle looks inside a life-size model of a submarine which the Chinese hope will take humans to the very bottom of the ocean - the Mariana Trench, in the Pacific, at a depth of nearly 11,000m (36,000ft).

Read more: How China is super-sizing science

  • 18 May 2016
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