[eljimmy]

Article mentions nothing about why it's a bad idea...

[EvilMonkeyMat]

I didn't even realize that. I guess that with hopes of finding new life at their highest ever, we wouldn't want to contaminate that (if that's the right way to say it).

[superbaconman]

I'm not sure that is the right way to see it. If we did find life on Mars would that mean humans could never travel there? I don't so. More than likely we need to transplant Earth life to Mars for large scale terraforming.

[User23]

It mentions harming a native biosphere that may exist.

[prepend]

So it may be a bad idea? Seems a little premature to make an absolute statement without any support.