European and Spanish space agency 4.

                                                                             1.

At last very,very important for many diseades how about the really weight of the air in Mars ?.These subject why not ? could be one of the questions that one day was traslate to us the unfforgetable Asimov.Then the quality of the air is important not only for the mentioned diseades but also for the weight that need the very smaller helicopter that travels across Mars.In this point so fine the calcule based in the triangle:

 ( a. ) Volcanoe top.

                ( b. ) Helicopter.

  ( c . ) Extreme underface.