1. Mars is cold and dry, but billions of years ago, it was cold and wet. That's according to new evidence from NASA's Curiosity rover.
2. The European Space Agency and NASA have announced a joint mission to learn more about asteroids. The mission is named 'Asteroid Impact & Deflection Assessment'.
3. Men in China smoke a lot of cigarettes, and it’s killing them at astonishing rates. A new research finds that one in every three young Chinese men will eventually die from the health impacts of the habit.