A spacecraft slowly descends to the surface of Mars. Once arid and lifeless, the Red Planet is now lush and green. As a city comes into view, passengers see people strolling along busy streets, ...

A spacecraft slowly descends onto the surface of Mars. This once arid and lifeless red planet is now lush and vibrant. As a city comes into view, passengers see people strolling along bustling streets ...

Giant, dense structures have been discovered beneath the surface of Mars and they are leaving experts both mystified and excited. The first of these, confirmed by researchers in a fascinating paper, ...