Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren.

A new review of ocean data suggests that more than 99.999 percent of the global deep seafloor has never been seen by humans. But what does that really mean? “In scientific papers, some people ...

While exploring the ocean in a deep-sea submersible, scientists say they discovered a flourishing ecosystem capable of ...

Bizarre creatures like vampire squid and blobfish make their home in the dark, cold, depths of the deep sea, but most of this watery realm remains a complete mystery. That's because humans have ...

A version of this article appears in print on July 14, 2025, Section B, Page 1 of the New York edition with the headline: Cables That Power the World Are Found Across Deep Seas.