Scientists Find Evidence for Water on Mars

We are ever fascinated by Mars, the most earth-like of planets with polar ice caps that grow and recede with the change of seasons, and markings that are similar to man-made canals on earth. For decades, sci-fi fans have fueled fantasies of Martians inhabiting the red planet. Now the idea of life on Mars doesn’t appear to be so far fetched, thanks to a new study of photographs taken by San Diego scientists who operated a camera aboard the global surveyor spacecraft. Guest

• Kenneth Edgett , senior scientist, Malin Space Science Systems.