Explainer

Seaweed
Explainer

What Seaweed Reveals About Eating Healthy

For years, seaweed has been arranged in dark green ribbons on rice, folded around sushi, dipped into soup, or left on the plate’s edge. It is now gaining more recognition in the food discourse. While food manufacturers are studying how a small amount might alter the nutritional profile of common food products, researchers are examining…

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Undersea volcano island
Earth

Volcanoes Beneath the Sea Form New Land

Far beneath the ocean’s surface, hidden from view, powerful forces are constantly reshaping our planet. Most of Earth’s volcanic activity happens out of sight, deep under the ocean. In these hidden places, new crust is constantly forming while older rock splits apart and hot magma rises from below. This ongoing movement shows that our planet…

Eroding coastline
Earth

Why Some Coastlines Wear Away Faster Than Others

Stand on two beaches just a few miles apart and the contrast can be striking. One may look wide, calm and stable, while the other shows crumbling cliffs, damaged dunes and waves steadily eating away at the land. Coastlines sit where water is always moving and land is often loose, so even small differences can…

Glowing deep sea
Biology

Why Some Deep-Sea Animals Glow in the Dark

The ocean remains a place where eyes stays essential far beneath the reach of daylight. In the darkness, animals make their own light. The sea holds the great majority of glowing life on Earth and that glow serves many jobs at once, from hiding a body outline to pulling prey close. Deep-sea bioluminescence is one…

Ocean upwelling
Earth

What Causes Ocean Waters to Rise From Below

The ocean may look calm on the surface, but beneath it lies a dynamic world of constant motion. Water doesn’t just move across the seas. Some currents travel horizontally across vast distances, while others sink deep or rise upward. When deeper water moves toward the surface, most scientists called this process upwelling. This plays an…

Ocean currents globe
Earth

How Ocean Currents Help Regulate Earth’s Climate

Earth’s climate is always moving. The tropics get strong sunlight, while the poles lose more heat than they receive. The planet stays balanced because air and ocean water constantly move heat around. The ocean is very important in this process because it stores heat, carries it across long distances and releases it back into the…

Deep sea vents
Chemistry

What Makes Deep-Sea Hydrothermal Vents So Unusual?

Far below the reach of sunlight, the seafloor can split open and release jets of mineral-rich water into the dark. Around those openings, called deep-sea hydrothermal vents, the ocean turns into something that feels almost otherworldly. Towering chimneys grow out of rock. Hot fluids burst into near-freezing water. And whole communities of animals gather where,…

Dissolving coral reef
Chemistry

What Happens When Coral Reefs Begin to Dissolve

Coral reefs look solid, almost permanent. From a distance they seem like underwater stone cities, full of color and motion, built to last for ages. Yet their strength depends on a fragile chemical balance in the sea around them. As the ocean takes up more carbon dioxide from the air, that balance shifts. The change…

Ocean microplastics
Chemistry

How Microplastics Mix With Pollution in the Ocean

The ocean is full of motion. Currents sweep across basins, waves grind coastlines and tiny fragments of human-made material drift through it all. Some of those fragments are now so small that they pass through water, sediment and living tissue with ease. They also pick up other contaminants along the way, which turns a simple…

Mercury in fish
Chemistry

Why Heavy Metals Build Up in Ocean Food Chains

The ocean has a quiet way of concentrating trouble. Tiny traces of metal can drift through water at levels so low they seem almost meaningless, then end up packed into the bodies of fish, squid, seals and the hunters that eat them. By the time those atoms reach the top of the marine menu, they…