For humans, being upside-down isn’t a comfy way to hang out for very long, but for these six animals, upside-down feels just right!

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With vibrant video clips captured by submarines, David Gallo takes us to some of Earth's darkest, most violent, toxic and beautiful habitats, the valleys and volcanic ridges of the oceans' depths, where life is bizarre, resilient and...

You might have noticed that sea urchins sometimes make some interesting fashion choices, covering themselves with all sorts of odds and ends, and it turns out they have a lot of different reasons for doing this.

You’d never tell just by staring out from a sandy beach, but the coasts are gradually getting darker, and the effects of this darkening are only beginning to be understood.

Waste not, want not.... right? Poop, in all of its various forms throughout nature, shapes the world in ways you might not imagine. One creature's waste is another's fuel, and all over nature these leftovers help new life spring up....

Some fish will never win any beauty pageants, but they still deserve our admiration, respect, and love, especially since their “ugly” traits are actually incredible examples of evolutionary innovation.

Sunken relics, ghostly shipwrecks, and lost cities aren't just wonders found in fictional adventures. Beneath the ocean's surface, there are ruins where people once roamed and shipwrecks loaded with artifacts from another time. Peter...

When you think about coral reefs, you probably imagine a sparkling tropical oasis that you can easily see while snorkeling or diving, but reefs can be found as deep as 8000 meters! As deep as they are, those reefs are still not immune to...

Oceanographer Paul Snelgrove shares the results of a ten-year project with one goal: to take a census of all the life in the oceans. He shares amazing photos of some of the surprising finds of the Census of Marine Life.

Oceanographer John Delaney is leading the team that is building an underwater network of high-def cameras and sensors that will turn our ocean into a global interactive lab -- sparking an explosion of rich data about the world below.

We may never know when our ancestors walked out of the water into dry land. But it's possible they may have been walking in water for millions of years!

About 60 percent of the ocean is a cold, dark region that spans down to 11,000 meters. This zone is known as the deep ocean, and though it seems like an inhospitable and remote corner of the planet, it is actually one of the greatest...

The Himalayas are well known for containing the highest elevations on Earth, but can they get higher or is there something putting a stop to their lofty pursuits?

In tropical seas, flying fish leap out of the water, gliding for up to 200 meters, before dipping back into the sea. In the Indo-Pacific, a hunting sailfish swims up to 110 kilometers per hour. These feats are made possible by a fish's...

Scientists have developed reliable early warning systems for tsunamis caused by earthquakes. The problem is, earthquakes aren't the only things that cause tsunamis.

Several cultures portray the world as being carried on the back of a giant turtle. As it turns out, sea turtles really do house an entire world on their backs — one of microscopic organisms, that is!

Natural history is full of living things that were long thought to have gone extinct only to show up again, alive and well. Paleontologists have a word for these kinds of organisms: They call them Lazarus taxa.

All octopuses start out as teeny, tiny plankton, and most grow up to settle down on the seafloor. The blanket octopus, however, never settles down, and spends its life wandering the open ocean.

Researchers have found ancient communities of microbes that have been buried deep, for a hundred million years! This discovery might be the oldest living thing on Earth, and could even expand the search for life on other planets.

Hundreds of meters below the surface of the ocean, Laura Robinson probes the steep slopes of massive undersea mountains. She's on the hunt for thousand-year-old corals that she can test in a nuclear reactor to discover how the ocean...

There aren't many creatures as safe and chill as the humble sea sponge, right? Well, not so fast! It turns out there's a whole family of carnivorous sponges that trap and eat small animals using spines and migrating stomaches!

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Morocco has 3/4 of the world’s known...

We still don't know a lot about the deep sea, but thanks to the help of three dead alligators, we know more about the diets of some of the creatures that live there.

Marie Tharp's topographical maps increased our understanding of both the ocean floor and the processes that move the earth's crust.