For a really gee whiz look at this image from NASA's Curiosity Rover go to
the JPL web site, here.
The perspective of tiny Earth viewed from one of her closest planetary neighbors, tells us all we need to know about the importance of preventing the itzy-bitsy dot of the cosmos that we occupy from becoming uninhabitable for humanity.
This place isn't very big and we are all stuck here together. As a species, humanity needs to figure that out, if, as a species, mankind is to have much of a future.
For all my Mars diaries and all things Martian on Daily Kos, go to Kossacks on Mars.