"Whatever that stuff is...don´tbring anz of it back here!" What, even if it is just crystals?<br /><br />I am all for caution in maintaining high standards of biological safeguards as a precaition, but the bio harzard posed by Martian samples returned to earth is very remote. Hundreds of labs round the world each day work on materials of known extreme danger - anthrax, smallox, lassa fever. There are studies that can only be done on earth and, after recconiassance by future astrobiology rovers and construction of the neccessary facilities for handling, should b be done. We can´t let sensantional web sites and SF movies care us into not doing things.<br /><br />But this is off topic, if you want to discuss MSR, start another thread.<br /><br />Jon <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em> Arthur Clarke</p> </div>