Scientists believe they have found water on Mars after finding that lines on the planet's surface are more visible in warm seasons.

Scientists announced on Thursday that they saw dark, finger-like features appearing and extending down some Martian slopes during late spring through summer, which fade in the winter and return during next spring.

These recurring features were located on several steep slopes in Mars' southern hemisphere, according to NASA, and are believed to be briny water.

"The best explanation for these observations so far is the flow of briny water," said Alfred McEwen of the University of Arizona, Tucson, in a statement. McEwen is the principal investigator for the orbiter's High Resolution Imaging Science Experiment, or HiRISE, and the lead author of a report about the recurring flows published in Thursday's edition of the journal Science.