Scientists have made a groundbreaking discovery that challenges our understanding of Earth’s structure: an ocean located deep within the Earth’s mantle. This hidden reservoir could rival the volume of ...

Add Yahoo as a preferred source to see more of our stories on Google. A large-scale drone attack struck deep inside Russia over the weekend. Benjamin Jensen, senior fellow at the Center for Strategic ...

Scientists report a possible new state of matter formed under extreme pressure and heat inside Uranus and Neptune.