This is how far nearest advanced aliens could be from Earth
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This is how far nearest advanced aliens could be from Earth
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For a time people have looked up at the night sky and wondered if there are other smart beings out there in the universe. Now scientists think that the universe is really really big so it is very likely that there are civilizations somewhere in the universe. The big problem is how away they are from us. Even the closest aliens could be so far away that we cannot talk to them with the technology we have today. We use telescopes and radio signals and space missions to look for clues. Space is a huge barrier that is stopping us. Some experts think that advanced civilizations might be hiding in our galaxy while others think they could be millions of years away watching the universe from a really long distance.