"<a href=""https://www.youtube.com/watch?v=ZecQ64l-gKM&amp;t=3h35m00s"">3:35:00</a> If there already is life in a shadow biosphere here on earth and we released lab made biology that interacted with that biosphere", wouldn't we potentially be causing harm? We would probably want to make sure there isn't already alien life here on earth in another biosphere. Maybe the "alien encounters" people have are aliens from here, not another planet