Salt streaks point to present-day water flows on Mars
![Salt deposits](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/09/092815_cc_mars-water_free-1.jpg?fit=860%2C461&ssl=1)
Salts deposited in dark streaks on Mars, such as these in the nearly 1,000-kilometer-long Coprates Chasma canyon, are left behind by seasonal water flows, a new study suggests.
JPL-Caltech/NASA, University of Arizona