Excellent, the details were incredible in the explanation of biological contamination. Science has advanced a lot and there are already spacecraft missions that have visited other planets, including the same planet Mars, the closest to the earth, great photographs have been obtained, also the Cassini-Huygens mission sent by NASA that landed on Saturn and I take many pictures. But nothing better than THE APOLLO 13 when the human being stepped on the MOON for the first time. that these studies continue to be carried out in depth, maybe on another planet there is life and we still do not know