Mars is one wet and wild world. Scientists are slowly warming up to the view that trickling amounts of water on the cold, dry planet may be nourishing Martian biology. Thanks to spacecraft observations by the Mars Global Surveyor (MGS), newly formed dark slope streaks on Mars have been spotted. Emanating from a point source, they widen as they flow down slope. In some cases, they divide into separate streaks as they encounter other surface features. These sharp-edged dark stains always appear on slopes, mostly inside craters and valleys, but also on small hills. They are almost always located below Martian sea level – zero elevation.