The dark lines on Mars are not water sources but something else

The dark lines on Mars are not water flows, but the sand in motion shows a new research earlier said that dark lines may be like water sources on Mars, but now scientists from Arizona say it's about sand on the surface itself or near the surface. Scientists say [...]
The dark lines on Mars are not streams of water, but the sand in motion, a new research shows
Earlier it was said that dark lines may be like water sources on Mars, but scientists from Arizona now say that it is sand on the surface itself or near the surface.
Scientists say that if there is water, they are small amounts that are not enough for life, the AP broadcasts.
But, at NASA, they warn the continuation of the research and that the possibility of the water presence on Mars is not largely extended.