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Astronauts on missions might not be all alone in outer space. This speculation has been raised by people who are searching for the unidentified flying objects (UFOs) and aliens in space including the astronauts themselves.

Some people and alien enthusiasts are speculating that UFOs and aliens appear in other planets. So, they are curious if these UFOs and aliens do really exist. It is interesting to know that human beings are not all alone in this universe if these are proven true with evidence.

Meanwhile, even some astronauts believe that they are not all alone in the space when they are on a mission. NASA astronaut and American engineer Leroy Chiao believes that there is life all over the universe. Chiao spent a total of 230 days on board the International Space Station (ISS) across four missions and conducted six spacewalks. He claimed that humans are not alone in the universe. He added that it is the "height of arrogance" to assume that the beings on Earth are only to emerge across the infinite universe for more than almost 14 billion years, according to Express.

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