Clouds drift over the dome-covered seismometer, known as SEIS, belonging to NASA's InSight lander, on Mars. NASA/JPL-Caltech Scientists have been experimenting with the core and the crust of the red ...

What’s the News: In geologists’ traditional view of the middle of the Earth, the solid inner core is gradually growing as more of the liquid core freezes, as the planet continues its billions-of-years ...