Do you often look at the sky? What can you see? The Moon or many stars. Is that all? What about other living things? Do they exist? Do they live in space? And will humanity ever be able to talk to them? For many years scientists with powerful telescopes have been trying to get answers to these questions. People have long wanted to learn about other creatures. People thought about how they might look. Little green men or tall humanoids with big eyes? The films and books show a variety of different images of aliens. Do they look like real inhabitants of other planets? Nobody knows. Some people think aliens will definitely be friendly. Others believe they are dangerous. But scientists do not expect that guests from space will fly to Earth. They are sure that the first contact will be established via messages.
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