For many years the possibility of terraforming, i.e. transforming the environment of another planet so as to make conditions a bit more more like those on our own, was little more than a science-fiction story. Things are changing. As mankind's knowledge and capabilities expand it is beginning to look as though, possibly before the end of the 21st century, we will have the technology to terraform Mars, our nearest planetary neigbour, with a view to changing the environment there with an aim of improving the prospects of living there in the future.
The question is a moral one: just because one could do something doesn't necessarily mean that one should do something. In the case of Mars, any history that Mars may reveal in its geology, geography and, perhaps, even a fossil record will have its course altered, irrevocably, by a terraforming process initiated from Earth.
The ill-fated recent attempt to place Beagle 2 there by Dr. Colin Pillinger's team had an underlying principle of not importing any Earth biology to the planet. Until the moral issue has been resolved this approach is admirable.
The question remains. As aliens to that body (we presume?), SHOULD we terraform Mars? Do we have a right to do that? Is the act of terraforming Mars a bit like "War of the Worlds" in reverse?
And if we should, does that give an alien race from elsewhere the right to transform Earth into something more akin to what it might expect, without regard to what is happening here?
Or do we have to redefine the concept of "alien"?
Discuss!