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 ...

True blue is one of nature's rarest tricks, and the animals that pull it off range from tiny ocean drifters that steal venom ...

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 ...