text: My first reason, is that there is not enough resources to be able to have life on Mars. There is barely any water except for ice on Mars. There are no plants to create oxygen. There have been no signs of any thing to provide life other than the frozen water as previously mentioned. Most of all Mars is too cold to be able to have life on it. The only way for something to live on Mars is if something somehow adapted to that type of enviroment.