A distant planet cloaked in clouds may be hiding a vast alien ocean beneath its surface. This video explores the shocking discovery of a “Hycean” world and what it could mean for extraterrestrial life ...

Known as Dalhousiella yabukii, the worm resides inside a glass sea sponge—a simple marine animal that forms a glass-like skeleton—in the cold, dark waters off the coast of Japan. And it’s just one of ...