NASA Finds Ancient Organic Material, Mysterious Methane on Mars
Serious question.  Why do we spend so much time on Mars?<p>Are we planning for evacuation of Earth?  I think it is clear that Mars is not suitable for mass migration.<p>Are we looking for evidence that Mars was Earth Version 1 and that we evacuated and came here?<p>Are we expecting to find minerals that we could ship to earth that do not exist here?<p>Is it just so we can say we did it?  I am curious because we have barely explored Earth and many parts of our planet are still challenging to study.  Is it cheaper to explore Mars?