But even that will disappear almost all life forms on Earth, but the microorganisms that live underground, that germs will be able to survive in this really hot atmosphere expected to occur on the planet. Microorganisms subsoil was the first form of life on Earth and is expected to be the last. But as the temperature increases on Earth, even the germs will not survive forever. Thus, it is estimated that about 3 billion years from now, the temperature of the earth will rise so much longer and even where the microbes will not be able to survive, turning a planet Earth without any life form.
For this reason, the Scots scientists arrived at the conclusion that the forms of life on other planets is essentially microorganisms that live underground and left no room for finding the existence of animal life form. Indeed, the more likely it is that planets that have life to have it in the form of microbes only, but this is not absolute. If there's an earth full of life because there are no planets like Earth with animal life and even intelligent beings? Certainly conditions for the existence of life beyond microbes are very difficult to occur after required conditions such as suitable composition of the planet, the ideal distance from its star, the proper motion of the planet, etc. But if the universe is literally endless because at certain points to no planets with appropriate conditions of life like Earth? statistically based should logically there are some other "worlds" like Earth that are full of life but the thing is that the nearest of these "worlds" can be located as far away from Earth where the modern technology make it impossible for the time being discovered this solar system and the planet ..