Dark oxygen was first discovered in 2015, but what is it? Learn how a deep-sea discovery could rewrite our understanding of ...

Why might the U.S. be interested in deep-sea mining, and what are the environmental risks? Here's what you need to know.

What's at the bottom of the Mariana Trench, and how do we know? How deep does the ocean go? We'll answer these questions and more in this deep dive into the world's oceans. Come on in: The water's ...

Countries have debated for decades whether to allow mining on the ocean floor, a potential trove of critical minerals. Now, a Canadian startup says it will move ahead, whether or not rules are in ...