Anybody who's ever seen the Men In Black movies knows that, not only do aliens exist, but they live and work among us here on Earth.
But, actually, one astronaut doesn't think that this is fiction.
Helen Sharman, a British astronaut who visited the Soviet Mir Space Station in 1991, says that "aliens exist, there's no two ways about it."
She told the Observer "There are so many billions of stars out there in the universe that there must be all sorts of different forms of life. Will they be like you and me, made up of carbon and nitrogen? Maybe not."
She goes on to double down on her theory, by saying "It's possible they're here right now and we simply can't see them."
So there you go!! An actual trained astronaut says aliens exist. Next thing you know, we'll find out those MIB movies were actually a documentary.