How deep is the ocean? Explorers started making navigation charts showing how wide the ocean was more than 500 years ago. But it’s much harder to calculate how deep it is.

Take a deep dive into the ocean’s secrets. ExtremeTech reveals its hidden layers and life forms. Discover the depths of our planet today.

Indian Ocean = 13,002 ft (2.5 miles) Southern Ocean = 13,000 – 16,000 ft (2.5- 3 miles) Arctic Ocean = 4,000 ft. With oceans this deep and very vast, is there any wonder that we know only so ...

And despite miles-deep abysses like the Mariana Trench, the ocean's mean depth is just 2.29 miles, thanks to the varied and bumpy ocean floor.

99.999 Percent of the Deep Ocean Is Unexplored — Its Secrets Are Key to Understanding Our Planet Learn more about why understanding how life works in the deep sea is crucial to understanding the ...

The work links a permanent oxygen boost in the Middle Devonian, roughly 393–382 million years ago, to the colonization of ...

The expedition discovered many sea creatures, including at least 40 species never seen by anyone before.

Their discovery made headlines worldwide, and marked a turning point in deep-sea exploration. To find Titanic, Ballard used ...