As unbelievable as it may seem, NASA has declared that there is water on Mars based solely on the fact that some material apparently vanished from a trench! That's what "science" has become today? Ridiculous!
We'll see what happens as the lander continues to test the soil at different temperatures, but based on the Electric Universe theory, it's unlikely that they will find any trace of water, and there must be another explanation for the vanishing material (I don't pretend to know what it is). See this article to learn why.