13 Unbelievable Ocean and Deep-Sea Facts That Sound Fake

The Mariana Trench is so deep that Mount Everest would sink with 2 km of water to spare.

Humans have explored less than 0.001% of the deep seafloor — less than the area of a small Indian district.

Roughly every second breath you take comes from ocean phytoplankton, not forests.

One tiny jellyfish, Turritopsis dohrnii, can reverse its own ageing and is considered biologically immortal.

India's Matsya-6000 aims to send three aquanauts 6,000 m down, joining an elite club of nations.

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