Mercury, the smallest planet in our solar system and the one closest to the Sun, has long baffled scientists with its twisted, fractured surface. Towering cliffs, deep ridges, and sprawling fracture ...

Mercury's barren surface has led to the planet being labeled as "dead," but signs of geological activity say otherwise. Bright streaks known as "lineae," which can be seen on slopes across the planet, ...

Add Yahoo as a preferred source to see more of our stories on Google. Measurements from NASA's MESSENGER spacecraft mapped the topography of Mercury's northern hemisphere in great detail. Planetary ...

Far smaller and closer to the Sun than it should be, Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission arriving in 2026 might ...

After only 6 months in orbit around Mercury, NASA’s MESSENGER spacecraft is sending back information that has revolutionized the way scientists think about the innermost planet. Analyses of new data ...

The solar system’s smallest planet may have vast riches beneath its surface, according to a stunning discovery by a NASA spacecraft. Scientists have determined that Mercury, the closest planet to the ...

A layer of diamonds up to 18 kilometers (11 miles) thick could be tucked below the surface of Mercury, the solar system's smallest planet and the closest to the sun, according to new research. The ...