Mars will appear its biggest and brightest this month when it reaches its closest position to Earth while simultaneously being opposite the sun. The Red Planet will be at its closest point to ...

With its iconic rusty hue, Mars has long been called the red planet. Now, scientists may have discovered the potential source of that distinctive coloring, overturning a popular theory in the process.

It seems clear that the clay layers are from a specific wet period in Mars' history during the Red Planet's Noachian era (spanning the time between 4.2 and 3.7 billion years ago), which is a ...