What I find the most interesting is how people consider these probes as a mean of actual human presence there. I mean, then don't settle with saying: "We send a machine there" -but they jump into saying: "We ARE there: we reached Mars!" -as if the notion of being-there had blended enough with technology to consider those devices as some sort of orthopedical extension of us...
I see this as a very positive thing. Maybe one day we won't care about our biological or even material presence at all, when everything is finally acknowledged as nothing but virtual experiences; and so we may legitimately travel through space and time, at the speed of light, beyond death, as pure data. That would be my dream, if I had anyone left.
"Now we are the Martians." -Ray Bradbury