sweetshot97 writes "According to the UK site, Times Online; future trips to Mars that will have probes return with samples of the martian surface may contain deadly microbes of course, foreign to our world. The threat may be incurable bacterial infections we have no cure for. What's funny is that we may have even infected Mars with our own bacteria when we sent several probes there. "
"Today's robots are very primitive, capable of understanding only a few
simple instructions such as 'go left', 'go right', and 'build car'."