A split style image showing an ordinary volcanic rock beside a vibrant microscope view revealing colorful crystal textures ...

An unusual rock type spotted by two Mars rovers may indicate that the Martian landscape was shaped by extremely violent volcanic eruptions. The Nili Fossae region of Mars, which includes the Jezero ...

For two months, whenever I heard that cry, I would run up to the deck of the JOIDES Resolution to watch the crew pull up a 30-foot (10-meter) cylindrical tube filled with layered, multicolored rock ...