Hi all, What am I missing?: Why are all these NASA folks so hyper-excited about this lander? Yes, it's cool that Spirit is safely sitting on Mars--and sending back neat pictures--but haven't we been "here" before? (Viking 1 and 2, nearly 30 years ago) Are all these hyper-excited NASA folks simply too young to remember that this has all been done before--and the first time 'round it was done with "30 year old" technology, no less? (now _that_ was something to get excited about) :-) There must be many good reason(s) why the NASA folks are acting as if they've done something miraculous and ground-breaking here, but in my ignorance I don't know what those reasons might be. Can y'all gently help me understand what all the rah-rah'ing is about? Chris