For the first time, a Mars rover has measured the mass of the rocks beneath its wheels. By taking gravity measurements as it climbed a Martian mountain, Curiosity discovered something surprising ...

Scientists appear to have unravelled the mystery of Mars' "Martian dichotomy" - a contrast between its southern highlands and northern lowlands that's puzzled experts for over half a century.

MARS HILL - The town is working with local groups to raise funds to protect Bailey Mountain Preserve against future development. The town of Mars Hill put up $120,000 to secure the two-year option ...