Whether you’re into deep-sea mysteries or deep space exploration, there’s probably an entire mini-series just waiting to be queued up. This isn’t just for docu-nerds.

Despite making up more than 90% of the Earth’s marine environment, much of the deep-sea ecosystems is still a question mark for researchers.

The bathypelagic zone of the ocean is 1,000 to 4,000 meters below the surface. Sometimes it's called the midnight zone because it's too deep for sunlight to reach. Most animals here are much smaller ...

The deep sea begins roughly 200 meters below the surface, at the depth where sunlight disappears. It makes up more than 90% of the ocean's volume, yet most of what lies beneath remains a mystery.

In a fascinating video, researchers have revealed a new and bizarre see-through species of sea slug floating around the midnight zone of the deep sea.

Things only got weirder from there. The organism’s distinctive, glowing presence was observed by multiple deep-sea missions between 2000 to 2021 but was simply referred to as “mystery mollusk.” ...

A new study published today in Science Advances shows just how little we know about the deep sea. According to the research, humans have observed less than 0.001% of the deep seafloor—an area ...

Humanity has only explored 0.001% of the deep sea, according to a May 2025 study. Credit - Getty Images The Trump Administration signed an executive order late last month aiming to fast-track ...