Hi all - 

One of the big reasons for the push behind panspermia comes from the usual 
manned Mars flight nuts who hope to wish away the back-contamination problem.
One can read Zubrin or his followers to see examples this kind of wishful hand 
waving and jumping and shouting (Fearing the Dragons).

But Mars will have to be shown to harbor no pathogens or life before manned 
Mars flight with return is permitted, in my opinion. The possible consequences 
otherwise are a show stopper.

E.P. Grondine
Man and Impact in the Americas


      
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