The planet Mars is home to thick layers of clay that can span hundreds of feet. Since they need water to form, these outcrops ...

The “boring billion” was, in fact, a lengthy time of dynamic geological activity. This is not the end of the story for Earth’s tectonic plates. Our planet’s surface is still undergoing radical changes ...

“It’s almost like the Earth is running the experiment for us,” she says. The planet’s tectonic plates are in constant motion, reshaping the surface as they pull apart and collide. The ...