Possibility of life on Mars?

The Curiosity rover has found evidence that Mars once had wet-dry cycles happening with a high frequency. This is significant because it suggests that Mars was once a more habitable planet than it is today.

The mud cracks that Curiosity found were in an area that was once covered by sulphates. This suggests that the water that evaporated and reappeared was salty. The mud cracks were only a few centimetres deep, which indicates that the wet-dry cycles were seasonal or could have happened even faster, like with flash floods. This finding is important because it provides more evidence that Mars was once a more hospitable place for life. It is possible that these wet-dry cycles created the conditions necessary for life to exist on Mars.

The discovery of mud cracks on Mars is just one more piece of evidence that the red planet was once a very different place. As Curiosity continues to explore, we may learn even more about Mars's ancient past and whether or not it was ever home to life.