A celestial rarity known as a blue micromoon will grace the night sky this weekend. It arises from the coinciding of two lunar effects. When there are two full moons in a single c ...

The second full moon of May — a blue moon — will make an appearance this weekend.

The sound of the blue whale’s singing has decreased off the coast of California, frightening scientists who believe it is an indication of greater ecosystem danger. Scientists tracked the auditory ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The Blue Ghost ...