Long ago, ‘huge amounts’ of water passed through the area, beginning at a higher elevation region and spilling into the northern plains. These features can be seen at the lower right and top left of the image, respectively
This is one of the largest valleys on Mars, and scientists say it may have been habitable up to 3.6 billion years ago.
Did alien life once exist here? European Space Agency reveals stunning shot of Mawrth Vallis area that may have been habitable