Apollo astronaut: 'ET has never visited us
Alan Bean, one of only 12 people to walk on the Moon, doesn't believe we have ever been visited by aliens.
The fourth person to set foot on the lunar surface, Alan Bean flew to the Moon in November 1969 as part of the Apollo 12 mission alongside Charles Conrad and Richard F. Gordon.
Despite venturing off-world however, Bean's views regarding the possibilities of extraterrestrial visitation have remained rather more down-to-Earth than his own space-faring experiences.
"I do not believe that anyone from outer space has ever visited the Earth," he said during a recent interview with Australia's news.com.au.
"One of reasons I don't believe they have been here is that civilisations that are more advanced are more altruistic and friendly.... so they would have landed and said 'we come in peace and we know from our studies you have cancer that kills people, we solved that problem 50 years ago, here's the gadget we put on a person's chest that will cure it, we will show you how to make it'."
Despite this however, Bean remains a firm believer in the possibility of life elsewhere in the universe.
"There's so many billions of stars and these stars have planets around them so there must be statistically many planets around many stars that have formed life," he said.