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Watch the full episode here: https://youtu.be/M99LbLkJL54 KaBOOM! What was that explosion? It was the Mariana Trench going up in a huge bomb blast! You brought your biggest nuke, similar to the Tsar Bomba, down 11 km (7 mi) to Challenger Deep, the deepest point of the Mariana Trench. Despite ...

Dark, cold and dangerous – is it true that our deepest oceans are as unexplored as the moon? And are there monsters? Or is it a magical place of grandeur and serenity? Find out from one of the few humans who has dived the Earth’s five oceans to their deepest points, including 11km down in the ...