I don’t believe in Aliens. Scientists and astronomers claim that they have proofs that aliens exist. I don’t believe in Aliens because I think Earth is the only place with an atmosphere, oxygen and water. Scientists say that they have found fossils in a rock from Mars. But I will never really know If there’s another living thing in the universe. Because the universe is huge or probably infinite and the human race still hasn’t gone any farther from the Solar system.