We've been telling you about how amazing Earth is, the only planet with life. Well that may not be exactly true. We're not talking about Martians invading our planet, but more like the possibility of bacteria, or yeast-like organisms. Even that is very hopeful.
Scientists hold out hope for Mars life for a couple of reasons.
It has a lot of water. Right now there are ice caps on the surface, but at one time there may have been water in liquid form under the surface of the planet. Where there is water there could be life. Mars also has weather. We also know that Mars has a heat source because of the volcanoes left on the surface.