David Attenborough deep sea diving
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Scientist find Earth's deepest sea trench full of life

Scientists have found activity in the depths of the Mariana Trench, 11 000 metres below sea level, the deepest known place on earth.

The findings were surprising as it had been assumed due to the high water pressure any kind of animal life would be impossible.

Dr Robert Turnewitsch, from the Scottish Association for Marine Science, is part of the international team researching the Mariana Trench.

He told BBC Radio 5live's Breakfast what they found lurking down there.