(Youtube)What China’s submersible mother ship takes back from Mariana Trench

China’s deep-sea submersible mother ship, Tansuo-1, has made new breakthroughs during a scientific expedition at the Mariana Trench in the West Pacific, the deepest area in the world. Researchers collected valuable biological samples at different depths below sea level. During the trip, an unmanned submersible, Haidou-1 dived to a depth of 10,767 meters, setting a new record for the country.

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