Introduction: For centuries, humans believed Earth's oceans were confined to the surface—until now. A groundbreaking discovery has revealed a hidden ocean, buried deep within the Earth's mantle, 700 kilometres below the surface. The question haunting scientists today: Could this reservoir, three times larger than all of Earth's surface oceans combined,...

A team of scientists from the University of Maryland has made a groundbreaking discovery that sheds new light on the inner workings of our planet. Led by geology postdoctoral researcher Jingchuan Wang, the team used innovative seismic imaging techniques to uncover evidence of an ancient seafloor that sank deep into...