What's at the bottom of the ocean? A brief history of deep sea exploration

Only about 20% of the ocean’s depths has been mapped by humans. Here’s what we do — and don’t — know about the deep seas and why studying them is so precarious.

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Expedition Deep Ocean, Book by Josh Young, Official Publisher Page

The History of Deep-Sea Exploration

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Why Nasa is exploring the deepest oceans on Earth

Unexplainable: 10 ocean mysteries scientists haven't solved yet - Vox

40 Ocean Facts That Will Blow You Out of the Water — Best Life

What causes ocean waves? : Ocean Exploration Facts: NOAA Ocean Exploration, water wave

What causes ocean waves? : Ocean Exploration Facts: NOAA Ocean Exploration, water wave

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