The question of whether we are alone or not in the universe has been answered by British astronaut, Tim Peake, ahead of his historic journey to the International Space Station.
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Speaking from Kazakhstan, the space traveller said "here is a high chance we will soon discover there was - or is - life in our solar system."
In an interview with the Mirror Online, he said: "I would be very surprised if there wasn't life elsewhere in the universe."
As with most educated guesses about what this "alien" life would look like, he explained that "single cell life forms might be found on Mars."
He added: "Wherever there is water, there is the possibility of life."
The 43-year-old father of two will lift off today at 11:03am (GMT) from the Baikonur Cosmodrome in Kazakhstan, on the Soyuz rocket from the launch site, dubbed Site No 1.
He will be the first Briton aboard the International Space Station, where he will spend most of his time carrying out a series of experiments examining how our biology copes with space as well as testing a suite of instruments and new technologies.