Was Mars Sterilized With Perchlorate?

Perchlorate is everywhere on Mars (http://www.planete-mars-suisse.com/crbst_166.html). It has been on Mars for billions of years (see above link). Perchlorate salts are produced by the oxidation of solutions of sodium chlorate, which is a bleaching agent ( http://en.wikipedia.org/wiki/Perchlorate#Production_and_use and 

http://en.wikipedia.org/wiki/Sodium_chlorate ). 

So, omnipresent perchlorate may be a sign of sterilization in ancient Mars.

Bone fragments may be unchanged in a sterile environment as shown in this experiment result: “As before, the fragments in the sterile environment were unchanged and appeared as fresh as new bone.” Quoted from the third paragraph in the third story at http://www.sciencebuzz.org/buzz_tags/dinosaur_bones

High resolution osteons in a dinosaur bone:

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