It could be easy to miss a blob the size of a golf ball. But its blue hue—the rarest color in nature—stood out against the sand, grabbing researchers’ attention. It wasn’t a blob but an adorable blue ...

It’s a deep blue creature in the deep blue sea. Scientists were delighted after discovering a new species of tiny, blue octopus nearly 6,000 feet down off the Galapagos Islands, per a study published ...

The ocean is blue because water absorbs colors in the red part of the light spectrum. Like a filter, this leaves behind colors in the blue part of the light spectrum for us to see. When sunlight hits ...

The ocean goes by many names — the high seas, the deep, Neptune's Realm — but its most famous moniker is the simple, iconic, Big Blue. The global ocean's deep blue hue is arguably Earth's greatest ...