The pearls are a type of ‘speleothem’ – mineral deposits that are formed in caves by moving water. They’re often found in shallow pools of water, and a study recently published in ...

The pearls are a type of ‘speleothem’ – mineral deposits that are formed in caves by moving water. They’re often found in shallow pools of water, and a study recently published in ...

They are actually a rare cloud called nacreous clouds or polar stratospheric clouds, they are also known as mother of pearl due to their iridescent appearance. They occur in the winter polar ...

Bright and dazzling, waves radiating rainbow colors sweep across the northern skies of Sweden, displaying beautiful hues. Known as "nacreous clouds" or "mother-of-pearl clouds," these clouds are a ...

Tropical rock lobsters, or pearl lobsters, as they're better known, are one of the rarest and most expensive lobster varieties. The colorful crustaceans are so valuable that there have even been ...